As a general rule employees prefer fixed shifts and employers prefer rotating shifts. You can read more about the pros and cons of each approach here:  Fixed Shifts vs. Rotating Shifts.

 

WIth fixed shifts, you can adopt a schedule that has fixed days of work or rotating days of work. A fixed-fixed schedule means you work the same days every week on the same shift. A fixed-rotating schedule means you always work the same shift, but the days change from week-to-week, usually following a set pattern.

 

Employees like the predictability of a fixed-fixed schedule. It's easy to plan the rest of your life around it. Surveys of shiftworkers found that predictability is the most important schedule feature, higher than weekends off, coverage for vacations, ability to get overtime, maximum time off, and others. You can read more about this here:  Schedule Predictability.

 

Fixed day schedules are frequently used in police departments and companies that operate less than 24/7, especially those that have a lot of part-time employees. With police, the officers bid on both the shift and the set of days worked. This is usually done once a year. They do this to reward seniority, since the most senior officers get the "best" schedules.

 

I've run into a number of medical facilities that create a new schedule every week. The most senior people have a fixed set of days they work. The scheduler then contacts everyone else to fill in the gaps. This is the absolute worst way to schedule. Not only is it a lot of work for the scheduler, but the junior employees never know when they will be working until just before the week begins.

 

With companies using part-time employees, fixed days makes it easier to find and schedule the part-time workers. They can work around their school schedules or other part-time jobs. They are often forced to build the entire schedule around the availability of a few key, part-time people.

 

The biggest problem with schedules using fixed days of work is that the employees are not treated the equally. Some people get both the shift they prefer AND every weekend off. Others (usually the newest, least-senior folks) get the worst shift and have to work every weekend. Double ouch! You can read more about this here:  Fairness.

 

Most of the schedules I design feature rotating days of work. The schedule follows a multi-week pattern. If you look at the 24/7 schedules examples that I sell (Schedule Examples), you'll find various options with 8 or 12-hour shifts that follow a pattern that lasts anywhere from 2 weeks to 20 weeks. When I custom design schedules, I usually match the length of the pattern to the number of employees on a shift. For example, if there are 5 people on a shift, I would create a 5-week pattern.

 

 

With rotating days of work, every employee on a shift is treated exactly the same. For example, with 5 people on an 8-hour shift, all 5 will get the same number of weekends off (maybe 1 or 2 weekends off every 5 weeks). They are all working the same pattern. It's just that they are in different weeks of that 5-week pattern. You are still rewarding seniority by allowing the most senior employees to bid on the shift they prefer. To me, this is best for everyone.

I've never seen statistics on this but, based on the inquiries for scheduling help I've had over the past 20 years, it appears that a majority of the companies that cover 24/7 use 8-hour fixed shifts. One big reason they never switched to 12-hour shifts was because their workload varied in 8-hour increments. They needed more workers during the daylight shift(s) or, in the case of police, paramedics, and call centers, they needed more workers during the evening hours, especially on Friday and Saturday.

 

These companies don't realize that it's possible to adopt a schedule with both 8 and 12-hour shifts. You simply create a 12-hour pattern that covers 24/7 and provides the coverage needed on the shift with the lowest workload (usually the night shift). Then you overlay that with one or two 8-hour shifts during the busier times of the day.

 

Here's an example. Suppose you need 4 people working from 8 a.m. to 4 p.m. and 2 people at all other times. You would adopt a 12-hour schedule that produces 2-person coverage on both shifts and overlay that with a single 8-hour day shift that produces 2-person coverage. The combination produces the exact coverage needed: 4 people from 8 a.m. to 4 p.m. and 2 people from 4 p.m. to 8 a.m.

 

Here's another example. You need 4 people from 7 a.m. to 10 p.m. and 2 people the rest of the day. You would use a 12-hour schedule with 2-person coverage on both shifts. Then you would overlay that with two 8-hour shifts, each with 2-person coverage. That would give you 4-person coverage during the entire busy period.

 

Employees don't really like 8-hour schedules. They don't get many days off, they have to work a lot of consecutive shifts, and most importantly they don't get many weekends off. Why not give some of the employees a better schedule using 12-hour shifts. Not everyone will like the 12s, so they can stay on one of the overlay shifts. This seems like a perfect solution. You're not making everyone switch to 12s, and you're offering an option to improve work-life balance for those willing to change.

 

Why don't you give us call to see how this might work for your organization? We can show you a few different options with all 8-hour shifts as well as a few options with both 8 and 12-hour shifts. Click on this link and fill out the form to get started:  Request Quote

My latest client was a Fire Chief who was facing pressure from city management to change from a 24-hour schedule (48/96) to an 8-hour schedule. I assume that the city officials mistakenly believed that 8-hour schedules don't have any overtime in them. Like many public agencies, they think all overtime is bad and should be eliminated. 

 

I started by showing the Chief what the current schedule looked like on a spreadsheet. It's a 6-week pattern with 6 teams working an average of 56 hours a week. The only way to get rid of the overtime is to add more staff. Shall I repeat that? The ONLY WAY to get rid of the overtime is by hiring more staff. Not changing the shift length. Not changing the work pattern. MORE EMPLOYEES is the only way.

 

With his coverage requirements (4 people at all times), the current schedule required 12 employees. By increasing the staff to 16, they could lower the average hours worked to 42 hours/week. It didn't matter whether they used 8-hour, 12-hour, or 24-hour shifts. All three approaches (with the exception of 8-hour fixed shifts, which would require 18 people) would need 16 employees averaging 42 hours a week.

 

What the city folks should have asked was:

1. Would adding 4 more employees cost less than the current approach (12 employees at 56 hours/week vs. 16 employees at 42 hours/week)?
   
   
2. And, if it is, is it worth disrupting the workforce and causing numerous personnel issues?

Overtime is really a substitute for staffing. In 24/7 operations, a little overtime can save a bundle. In this city's case, the answer is not so clear. However, the belief that changing to a different shift length would eliminate the overtime is not accurate. The only way to lower the overtime would be to hire more staff. 

When managers decide to change their group's work schedule, they often begin by searching the internet for: (1) schedules using a specific shift length such as 10 or 12-hour shifts, or (2) popular work patterns such as 4-on-2-off or the Pitman. Unfortunately, doing this will rarely result in the best choice for their unique situation. Here are a few examples of the pitfalls:

• Picking 10-hour or 12-hour shifts when the workload varies in 8-hour increments.
• Using a schedule with constant coverage when their workload varies from shift-to-shift.
• Selecting a schedule pattern (e.g., 4-on-2-off) that requires 6 people per shift, when they have something else.
• Picking a schedule that requires 18 people when other options only require 16.
• Adopting a schedule that is great for day shift, but terrible for night shift.

I'm sure there are plenty of other possibilities, but you get the idea. Many people forget that the primary purpose of the schedule is to match the coverage with the workload. To achieve that goal, you need to start with the number of people needed at different times of the day throughout the week. In many cases, this will limit which shift lengths are feasible. You can read more about that here (Shift Length Selection (shift-schedule-design.com). 

 

Once you have the shift length(s) established, you need to find or create a pattern that will produce the desired coverage with minimal resources and with maximum weekends off. There is no way that an internet search will ever help with that. 

 

What do most people do? They find a schedule or create one that they think looks good, adopt it, and live with a mediocre solution, never aware that other approaches or work patterns would have been far superior. They avoid hiring a scheduling expert to save a few hundred dollars and end up costing the organization more than that every week because they got a solution for free. 

 

Wouldn't it be better to have someone with scheduing expertise go over your situation, show you alternative approaches (e.g., 8-hour fixed shifts vs. combined 8 and 12-hour fixed shifts), and lay out a few different work patterns for each approach? Since the options would all be in the same format, they would be easy to compare and evaluate. You could show them to your workers and let them debate the pros and cons of each option. This is way scheduling should be done.

 

Click on this link and fill out the form to get started today: (Request a quote for custom schedule design (shift-schedule-design.com)

Some time ago, I got a call from the Chief of Police from a small city in the Mid-West. He had 6 officers and needed a minimum of 1-person coverage on a 24/7 basis. Their work schedule consisted of 8-hour fixed shifts. The officers were pretty happy with the schedule since they got every other weekend off. The problem was the high overtime expenses needed to cover vacations and other absences. The officers had an absence rate of almost 20%, which resulted in an overtime bill of around $80K a year. He was thinking about hiring another officer, but couldn't figure out how to use him to cover absences unless it was his full-time job.

I told him that he didn't need to hire more staff'; he needed a different schedule. 8-hour fixed shift schedules are not very efficient, especially in small groups like his. In his case, they would provide 1-person coverage 4 days a week and 2-person coverage 3 days a week. To ensure every other weekend was off, the double coverage was scheduled for weekdays only. Since most absences occurred on the weekends (when they only had 1-person coverage), they were forced to use overtime to avoid gaps in the coverage.

When choosing the best scheduling approach, he and his officers would have to make a tradeoff between shift length and format (fixed vs. rotating shifts) when selecting a new schedule. If having fixed shifts was most important schedule feature, they should adopt a 12-hour fixed shift schedule. If having 8-hour shifts was most important, they should adopt an 8-hour rotating shift schedule. Either approach would free up capacity to cover absences without excessive overtime. Flexible relief time could then be built right into the schedule.

With the12-hour fixed shifts, 3 officers would be assigned to each shift. Each shift would have a 3-week schedule in which one week was devoted to relief coverage and the other two weeks were devoted to the required coverage. They would have to work an average of 42 hours a week. Yes, overtime would be required, but a total of 12 hours per week for the entire group is all they would need. 

With the 8-hour rotating shifts, the 6 officers would work a 6-week schedule in which two weeks were devoted to relief coverage and 4 weeks were devoted to the required coverage. They would also average 42 hours a week.

 

The Chief said he'd have to think about it. He was hesitant to do this because the city was opposed to having employees work more than 40 hours a week and the officers were opposed to changing schedules. I never heard from him again. I suppose he's still incurring overtime every time someone is absent, having poor coverage, or maybe still searching for ideas on how to fix this. Or maybe he hired another officer. So he is either spending $60K a year for a 7th officer (wages + benefits) or $80K on overtime. What would you do?

“Work-life balance” is largely a desire for more time off from work. That’s why so many employees want to change their work schedules. They want more days off and, for jobs that require Saturday and/or Sunday work, more full weekends off. In facilities that run 24/7, this often leads to a search for a schedule using 10 or 12-hour shifts, or a work pattern with less than 40 hours of work per week. Even though this means longer days of work or reduced compensation, many employees feel the extra time off is worth it.

 

Unfortunately, this can be in direct conflict with the common employer goal of maximizing employee utilization. For work schedules, this means achieving maximum coverage for the lowest possible cost. In 24/7 operations, “lowest cost” often requires keeping the headcount as low as possible and adopting a schedule that averages 42 hours a week (Why Eliminating Overtime in 24/7 Schedules Can Be Costly).

 

Thus, when it comes to choosing the best work schedule, management and the workers have different goals. Employees focus on the time off. Managers focus on minimizing headcount and cost. So, how do you strike a balance between these opposing points of view?

 

If you start from the employee perspective, you could end up with something that the employer just can’t afford. A good example is a company that works 24/7 and has a relatively steady workload. The employees want to change from 8-hour shifts to 10-hour shifts. This would require the company to hire 25% more staff (10 hour shifts). For most companies, this is clearly infeasible.

 

But, if you ignore what the employees want, you risk having high turnover, increased absences, and reduced productivity. As Mike Michalko recently commented on my website, “Too little emphasis on the employee leads to turnover and the high costs associated with onboarding and training. This is aggravated with needed positions in a highly competitive job market. If an employer doesn't address employee satisfaction, they'll end up training someone else's workforce.”

 

So, where do you start? I think it’s important to reflect on the reason you have a schedule in the first place. Most people think of the schedule as an on-off work pattern for a specific shift length, for example, a 5-on-3-off pattern for 8-hour shifts or a 2-3-2 pattern for 12-hour shifts. While it's true that the shift length and work pattern are essential components of the schedule, they don’t explain why the schedule is needed. 

 
The real purpose of the schedule is to ensure proper coverage:  the right number of people with the right skills at the right time and place. If the coverage isn’t adequate or matched to regular variations in the workload, the group won’t be able to provide the amount or quality of product/service expected by its customers. The schedule ensures that the organization effectively fulfills its purpose of satisfying the needs of its customers.

 

Therefore, the top priority for the schedule must be to maintain a level of coverage that matches customer demand. In most cases, more than one approach (usually different shift lengths) is possible. I’ve previously discussed how the hours of operation and the workload variability dictate the best choice of shift length(s):  (Shift Length Selection).

 

As an example, consider a company that operates 24/7 and needs 2 people working at all times. They first have to decide whether to use fixed shifts and rotating shifts. As a general rule, employees prefer fixed shifts whereas employers prefer rotating shifts (Fixed shifts vs. rotating shifts). In this example, we’ll assume they choose fixed shifts. Next, they have a choice between 8-hour shifts or 12-hour shifts. The 8-hour fixed shifts will require 9 employees working an average of 37.3 hours a week, whereas the 12-hour fixed shifts will require 8 employees averaging 42 hours a week. They decide to narrow the search to these two approaches.

 

For each approach, several different work patterns are possible. These patterns will vary in terms of the number of consecutive days of work and the nature of the days off. In general, the longer the blocks of work days, the longer the blocks of days off and the longer the weekends off.

 

Once the alternative patterns are developed, the company should involve the employees who will be working the schedule (Strategic Schedulers Enjoy Remarkable Success). The workers must choose between longer days of work more time off. They also must choose between longer blocks of work days and longer blocks of days off. The majority will decide how important work-life balance is and what sacrifices they are willing to make to achieve it.

 

To summarize, these are the recommended steps in changing employee work schedules:

1.       Establish the organization’s coverage requirements by time of day and by day of the week. Do you need the same number of people all day long? Maybe there is less work during the nighttime. Do you need the same number of people throughout the week? Maybe there is less work during the weekends. Here’s an example for a company that works 24/7:

 

 

2.       Identify different approaches (usually two different shift lengths) that will efficiently achieve the organization’s coverage requirements. The hours of operation and regular workload variations will play a key role in this step. Approaches that are highly inefficient will not be considered, e.g., unnecessary double coverage or excessive staffing requirements.

3.       Find alternative work patterns for each approach. Alternatives will vary the number of consecutive days of work, which will affect the amount and the nature of the time off.

4.       Involve employees in the review of all the options and final selection of the schedule. This gives them the opportunity to decide whether the improved time off is worth the (a) longer days of work, (b) more consecutive days of work, and/or (c) the average weekly hours of work.

 

Although work-life balance is not the starting point when changing work schedules, it is addressed by identifying different approaches/patterns that satisfy the coverage requirements, and then allowing employees to review, discuss, and vote on their preferred option. Shift Schedule Design can help you find the best approaches and associated work patterns. Please click on the link below to get started:

 

Request a quote

 

 

 

“We work 24/7 and we want to change to 10-hour shifts. Can you help us?” How many times have I heard that? At least 2-3 times a week. Yeah, 8-hour shift schedules suck. You might want to read about them here:

·         8-Hour Rotating Shifts (shift-schedule-design.com)

·         8-Hour Fixed Shift Schedules (shift-schedule-design.com)

The problem is that few companies have enough resources to make the change to 10-hour shifts. If you are simply replacing your three 8-hour shifts with three 10-hour shifts, your coverage will be reduced by 25%. For example, if your current 8-hour schedule produces 4-person coverage, a new 10-hour schedule would reduce that to 3-person coverage. 

Why is that? Let’s look at a simple example with rotating shift schedules. Here’s a popular 8-hour pattern called the Continental.

8-Hour Shifts

Crew / Week	Thu	Fri	Sat	Sun	Mon	Tue	Wed	Hours
A / Week 1	-	-	D8	D8	A8	A8	N8	40
B / Week 2	N8	N8	-	-	D8	D8	A8	40
C / Week 3	A8	A8	N8	N8	-	-	D8	40
D / Week 4	D8	D8	A8	A8	N8	N8	-	48
							Average	42

Key:

D8 = 8-hour day shift

A8 = 8-hour afternoon shift

N8 = 8-hour night shift

 

This is a 4-week, rotating schedule operated by 4 crews. When the schedule first starts, the crews are assigned to specific weeks in the cycle. Crew A is assigned to start in Week 1, Crew B is assigned to start in Week 2, and so on. At the end of each week, the crews rotate down to the next week in the cycle. Crew A moves to Week 2, Crew B moves to Week 3, etc. When a crew completes the 4th week, they rotate up to Week 1. 

 

Yes, this is a terrible schedule to work. You work 7 shifts in a row and you have to change shifts every 2-3 days. Worst of all, you only get one weekend off every 4 weeks. 

 

You'll notice that there is a D8, A8, and N8 under each of the days of the week. This means one crew is scheduled to work each shift, all week long. Maybe not the same crew, but there will always be one crew scheduled for each shift. If the total staff is 16 people, each crew would have 4 employees. That means there would be 4 people at work at all times on a 24/7 basis.

 

Now let's see what happens if you change to a 10-hour rotating shift schedule.

 

 

10-hour Shifts

 

Crew / Week	Thu	Fri	Sat	Sun	Mon	Tue	Wed	Hours
A / Week 1	-	D10	D10	-	-	D10	D10	40
B / Week 2	D10	-	-	D10	D10	-	A10	40
C / Week 3	A10	A10	-	-	A10	A10	-	40
D / Week 4	-	-	A10	A10	-	N10	N10	40
E / Week 5	N10	N10	N10	N10	N10	-	-	50
							Average	42

 

Changing to 10-hour shifts requires creating a 5^th crew and it doesn’t get rid of the overtime in the schedule. There are better patterns than this one that would give you 2 weekends off every 5 weeks. I can show you options that do this, but not for free.

Since the staff size (16) hasn't changed, four of the crews will only have 3 people and one will have 4 people. This means the coverage will now be only 3 instead of the 4 you had with the 8-hour shifts.

 

The positives of the 10-hour schedule for employees are that you get more days off (3 days a week for 4 out of 5 weeks) and more weekends off (up to 2 weekends off every 5 weeks). Negatives are the smaller breaks and the change in absence coverage.

 

With 10-hour shifts, you can't hold people over to cover an absence like you did with 8s. Absences have to be covered by calling people into work who are scheduled to be off. As an employee, you could end up working 5 or more shifts a week depending on the absence rate and whether you had any extra capacity before making this change.

The key question of course is whether it’s worth switching to 10-hour shifts. Increasing the average hours of work by 25% or hiring 25% more employees is hard to justify. Reducing the coverage by 25% is not a good choice either. Would the employees benefit that much? Maybe, maybe not. I find it pretty hard to justify.  

 

Don’t get me wrong. I’ve written plenty of articles about how to use the 6 hours a day that 10-hour shifts overlap to match the coverage to a variable workload. 10-hour shifts do have a place, if you can afford it. It’s been my experience that few smaller organizations (less than 50 employees) can do it.

 

Here is another article about 10-hour shifts with links to several of the other articles I've written on this topic: 10-hour Shifts.

 

 

The earliest 24/7 schedules were based on 8-hour rotating shifts. These schedules require employees to rotate through all three shifts: days, afternoons, and nights. Most of them use 4 equal-sized crews. If the company needed 8 people working around-the-clock, they would have 8 employees on each of the crews. Three crews would be working each day of the week (one on each shift) while the fourth crew was off. The different work patterns vary in the number of days worked before getting time off and how long it takes to get to the next shift.

In this article, we will look at the two key features of 8-hour rotating shift schedules: (1) consecutive days of work, and (2) speed of rotation.

 

Consecutive Days of Work

As a general rule, the more consecutive days of work, the longer the breaks (days off) and the more frequent the weekends off. Unfortunately, when you increase the days of work, sleep debt accumulates. Choosing from different work patterns thus involves a tradeoff between increased fatigue and more attractive time off.

The Continental shift schedule, one of the earliest and most popular patterns, required working 7 shifts in a row before getting 2 or 3 days off. This schedule had one full weekend off every 4 weeks.

Many employees found that working 7 consecutive shifts was too much, so they insisted on working fewer days in a row. A pattern with 6 consecutive shifts (the Metropolitan Plan) only offered one weekend off every 8 weeks. A pattern with 5 consecutive shifts only offered one weekend off every 10 weeks, and those occurred back-to-back, so that employees would have to go 18 weeks without a weekend off. Ouch!

Here's a table that compares 4 most common patterns:

 

	5 Days	6 Days	7 Days	7 Days
Sat-Sun off	every 10 weeks	every 8 weeks	every 4 weeks	every 4 weeks
Max. days off	2	2	3	4
Min. days off	1	2	2	1

 

 

Speed of Rotation

Some employees prefer to rotate quickly from shift-to-shift. That way, they don’t have to work a bunch of night shifts all at once. The Continental is a good example of a fast rotation. Here’s what that pattern looks like:

 

 

 

Crew / Week	Thu	Fri	Sat	Sun	Mon	Tue	Wed	Hours
A / Week 1	-	-	D8	D8	A8	A8	N8	40
B / Week 2	N8	N8	-	-	D8	D8	A8	40
C / Week 3	A8	A8	N8	N8	-	-	D8	40
D / Week 4	D8	D8	A8	A8	N8	N8	-	48
							Average	42

Key:

D8 = 8-hour day shift

A8 = 8-hour afternoon shift

N8 = 8-hour night shift

 

This is a 4-week, rotating schedule operated by four crews. When the schedule first starts, the crews are assigned to specific weeks in the cycle. For example, Crew A is assigned to start in Week 1 and Crew B is assigned to start in Week 2, and so on. At the end of each week, the crews rotate down to the next week in the cycle. Crew A moves to Week 2, Crew B moves to Week 3, etc. When a crew completes the 4^th week, they rotate up to Week 1.

 

For companies that want a slower rotation, they could simply devote each block of days to a single shift, as shown below:

 

Crew / Week	Thu	Fri	Sat	Sun	Mon	Tue	Wed	Hours
A / Week 1	-	-	D8	D8	D8	D8	D8	40
B / Week 2	D8	D8	-	-	A8	A8	A8	40
C / Week 3	A8	A8	A8	A8	-	-	N8	40
D / Week 4	N8	N8	N8	N8	N8	N8	-	48
							Average	42

Key:

D8 = 8-hour day shift

A8 = 8-hour afternoon shift

N8 = 8-hour night shift

 

With this adjustment, the rotation is slowed to once a week. The other two patterns (6 days and 5 days) also rotate shifts on a weekly basis. This is still too fast for many people, but a slower rotation can be difficult to achieve.

 

One approach is to increase the number of crews from 4 to either 9 or 12. It’s not as efficient (i.e., it requires a slightly larger staff), but it will slow the shift rotation to once every 3 or 4 weeks.

 

The ultimate approach is to adopt a fixed shift pattern and then re-allocate the employees to different shifts periodically, such as every 6 or 12 months. This also may require a few additional employees since 8-hour fixed shift schedules are not as efficient as 8-hour rotating shift schedules.

 

Summary

8-hour rotating shift schedules have two key features: consecutive days of work and speed of rotation. 

 

The most attractive schedules for employees in terms of time off require them to work 7 shifts in a row. Unfortunately, this is really tough on sleep. That’s why some employees would rather work fewer consecutive shifts, even though they get fewer weekends off.

 

Some employees prefer a fast shift rotation so they only work 2 or 3 night shifts in a row. Most employees, however, prefer a much slower rotation. This can be achieved by increasing the number of crews or by adopting a fixed shift schedule and having employees change shifts every 6 or 12 months.

 

As a general rule, employees prefer fixed shifts while employers prefer rotating shifts (Fixed shifts vs. rotating shifts). Because of this, many companies migrated to 8-hour fixed shifts or longer shift lengths (usually 12-hour shifts). Fixed shifts eliminated the need to change shifts, which helped to reduce fatigue and improve predictability (Schedule Consistency & Predictability). Longer shifts resulted in more days off and more weekends off, which also helped reduce fatigue (12 Hour Shifts).

 

Many companies that operate 24/7 have their employees work an 8-hour fixed shift schedule. With this type of schedule, employees never change shifts, but may work different days each week following a multi-week work pattern. This is called a fixed shift schedule with rotating days of work. Unlike a schedule with fixed shifts and fixed days of work, this approach treats everyone equally in terms of weekends off, so it tends to be the preferred approach.

When these companies first started covering 24/7, they may have adopted a work pattern that was popular for their line of business or the managers had some experience with. The schedule may have worked fine initially, but as the company grew and added more employees, management didn’t update the schedule. They may not have realized that the pattern only works properly for a specific coverage level.

Let’s take a closer look at two popular 8-hour work patterns to understand why they only work under certain conditions. We will only show one shift (the 8-hour day shift = d8) since the pattern will be the same for all 3 shifts. Each crew should have the same number of people, so that the coverage is consistent from day-to-day.

4-on-2-off
Crew / Week	Thu	Fri	Sat	Sun	Mon	Tue	Wed	Hours
A / Week 1	d8	d8	d8	d8	-	-	d8	40
B / Week 2	d8	d8	d8	-	-	d8	d8	40
C / Week 3	d8	d8	-	-	d8	d8	d8	40
D / Week 4	d8	-	-	d8	d8	d8	d8	40
E / Week 5	-	-	d8	d8	d8	d8	-	32
F / Week 6	-	d8	d8	d8	d8	-	-	32
							Average	37.3

 

The way this pattern works is there are 6 crews for each shift, labeled A, B, C, D, E and F. Each crew begins the schedule in the week they are shown. Crew A begins on Week 1, Crew B begins on Week 2, Crew C begins on Week 3, and so on. After finishing that initial week, they rotate to the next week of the schedule. Crew A moves to Week 2, Crew B moves to Week 3, and Crew F moves to Week 1. They continue this rotation until after Week 6, in which they rotate back up to Week 1.

If you start at the top, you’ll see that you would work 4 days (Thu-Sun) and have the next two days off (Mon-Tue). Then you would work 4 more days (Wed-Sat) and have the next two days off (Sun-Mon). This pattern of working 4 days in a row and then taking the next 2 days off continues indefinitely.

You’ll see that there are four d8s shown under each day of the week. This means that 4 crews are always scheduled to work. If you need 4-person coverage, you would simply have one person in each of the 6 crews. If you need 8-person coverage, you would have two people in each of the crews.

But what if you need 3-person coverage or 5-person coverage or something else that isn’t a multiple of 4? That’s where this pattern stops working correctly. Yes, people use it for the wrong coverage levels or with the wrong number of crews and wonder why the coverage isn’t consistent. It only works properly for coverage that is a multiple of 4 people. And it only works if you use 6 crews on each shift.

Employees like this pattern because they only have to work 4 consecutive days and they always get 2 days off. They don’t like that they only get one full weekend off every 6 weeks. In addition, there are 2 weeks in which they only get 32 hours of pay. You could add more days to make 40 hours, but that would disrupt the 4-on-2-off pattern.

 

Here's another pattern:

6-on-3-off
Crew / Week	Mon	Tue	Wed	Thu	Fri	Sat	Sun	Hours
A / Week 1	d8	d8	d8	d8	d8	d8	-	48
B / Week 2	-	-	d8	d8	d8	d8	d8	40
C / Week 3	d8	-	-	-	d8	d8	d8	32
D / Week 4	d8	d8	d8	-	-	-	d8	32
E / Week 5	d8	d8	d8	d8	d8	-	-	40
F / Week 6	-	d8	d8	d8	d8	d8	d8	48
G / Week 7	-	-	-	d8	d8	d8	d8	32
H / Week 8	d8	d8	-	-	-	d8	d8	32
I / Week 9	d8	d8	d8	d8	-	-	-	32
							Average	37.3

 

This pattern uses 9 crews on a 9-week pattern. It works the same way as the previous schedule. The crews begin the schedule in the week they are shown next to: Crew A begins in Week 1, Crew B begins in Week 2, and so on. After finishing that initial week, they rotate to the next week of the schedule. After completing Week 9, they rotate up to Week 1 and start the pattern over again.

You’ll see that there are six d8s listed under each day of the week. This means that 6 crews are always scheduled to work. If you need 6-person coverage, you would simply have one person in each of the 9 crews. If you need 12-person coverage, you would have two people in each of the crews.

Using this pattern with anything other than 9 crews throws everything off. Likewise, trying to achieve any coverage level that isn’t evenly divisible by 6 won’t consistently produce the coverage you want.

 

Recommended Approach

So, if these popular 8-hour patterns only work for a limited number of situations, how are you supposed to pick a schedule? You should always begin with the desired coverage level. In this article, I will discuss 3 coverage levels:

• 1-person
• 2-person and multiples of 2 people such as 4, 6, 8, etc.
• 3-person and multiples of 3 people such as 6, 9, 12, etc.

I won’t address odd coverage levels (such as 5, 7 or 11) as these would require a custom-designed schedule, often without any crews.

I will show one pattern for each level of coverage, even though there are many others that are superior. Sorry, you have to pay for the good stuff. The patterns shown here simply illustrate the point that schedule selection should never begin with a preferred pattern. Instead, coverage levels should always be the starting point for schedule creation. Coverage levels dictate the number of crews or employees needed for each shift. Once that has been established, you can compare different work patterns using that number of crews/employees.

1-Person Coverage
Crew/Week	Thu	Fri	Sat	Sun	Mon	Tue	Wed	Hours
A / Week 1	-	d8	d8	d8	d8	d8	-	40
B / Week 2	d8	d8	-	-	d8	d8	d8	40
							Average	40

 

With 2 crews working 40 hours a week, there will always be 3 days a week with double coverage on each shift. In the pattern above, this occurs every Friday, Monday and Tuesday. If you eliminate the extra coverage, employees would only average 28 hours a week. Full-time employees won’t tolerate this, which is why it’s not shown.

This inefficiency is why 8-hour fixed shifts are rarely used when you need 1-person coverage. Other approaches such as 8-hour rotating shifts or any type of 12-hour shift schedule would only require 4 people, though they do make employees work an average of 42 hours a week.

Employees like this sort of schedule because they get every other weekend off. But it requires a lot more employees than other approaches, so few organizations can afford to adopt it. If you have unlimited resources and can tolerate the double coverage three days a week, go for it! Better yet, why not adopt a 12-hour fixed shift schedule that requires 33% fewer employees and gives them almost twice as many days off.

 

2-Person Coverage (and multiples of 2 people)
Crew/Week	Thu	Fri	Sat	Sun	Mon	Tue	Wed	Hours
A / Week 1	-	d8	d8	d8	d8	d8	-	40
B / Week 2	d8	d8	d8	-	-	d8	d8	40
C / Week 3	d8	-	-	d8	d8	d8	d8	40
							Average	40

 

Unlike the pattern for 1-person coverage, this is more efficient because it only has 1 day of extra coverage every week. In the above example, there are 3 d8’s every Tuesday. This schedule can be used coverage that is any multiple of 2 people such as 4, 6, 8, 10, etc.

The pattern shown here is not very good for employees, however, since they would never get a full weekend off. Don’t be discouraged. There are other patterns that provide one full weekend off every 3 weeks, some that are up to 4 days long. Like I said, you have to pay to see the good ones.

You could drop the Tuesday shift in either Week 1 or Week 2 of the above pattern, but then the employees would only get 32 hours that week. Over a 3-week period, they would average 37.3 hours/week, the same as the 4-on-2-off and 6-on-3-off patterns shown earlier. In some cases, depending on the pay week, dropping the unnecessary coverage might extend the weekend off so that employees wouldn’t mind getting fewer hours of work/pay.

 

3-Person Coverage (and multiples of 3 people)
Crew/Week	Thu	Fri	Sat	Sun	Mon	Tue	Wed	Hours
A / Week 1	-	d8	d8	d8	d8	-	d8	40
B / Week 2	d8	d8	d8	-	-	d8	d8	40
C / Week 3	d8	d8	-	d8	d8	d8	d8	48
D / Week 4	d8	-	d8	d8	d8	d8	-	40
							Average	42.0

 

8-hour fixed shift schedules for 3-person coverage (or multiples of 3) are the most efficient of all, since there is no unnecessary extra coverage. They do require a small amount of overtime, however.

For employees, the above pattern wouldn’t be very attractive since they would never get a full weekend off. There are other patterns using 4 crews per shift that provide weekends off. A pattern that is based on working 5 shifts in a row will provide 5 weekends off each year. A pattern based on working 6 shifts in a row will provide 6 weekends off each year. A pattern based on working 7 shifts in a row will provide 13 weekends off each year.

For work-life balance, many employees will say that working 7 consecutive days to get 1 weekend off every 4 weeks isn’t worth it. But the prospect of only getting 5 or 6 weekends of a year is even worse. That is exactly why so many companies have switched to 12-hour shifts. They found that both the company and the workers benefitted from the longer shifts. Yes, workers hated working for 12 hours, but they accepted the long hours to get twice as many days off and up to half the weekends off (12 Hour Shifts | Shift Schedule Design (shift-schedule-design.com)).

 

Summary
When choosing an 8-hour fixed shift schedule, adopting a well-known or familiar work pattern, such as the two discussed in this article, will only work properly if your coverage and number of crews match the pattern’s requirements. If your coverage or staff size doesn't match, you may have to overstaff to reach your desired coverage level and the coverage will vary from day-to-day.

Many of these well-known patterns average less than 40 hours a week - not the most effective way to utilize your employees. For employees, although the pattern may be easy to remember or explain, they rarely provide as many weekends off as other 8-hour options.

The best way to select an 8-hour fixed shift schedule is to start with the desired coverage level. That, in turn, will dictate how many crews are necessary. Three of the most common approaches were discussed in this article:

• One-person coverage using 2 crews per shift, or 6 total crews.
• Two-person coverage (or multiples of 2) using 3 crews per shift, or 9 total crews.
• Three-person coverage (or multiples of 3) using 4 crews per shift, or 12 total crews.

Once the number of crews is decided, the company can search for compatible work patterns. That way, employees can discuss and compare the different patterns, and then vote for the one they prefer. I recommend that you also include a few options using 12-hour shifts, just so the employees are aware of what else is possible. Naturally, I hope you'll consider our company to show you these different options. Please click on this link below and fill out the form. I'll respond with a proposal that outlines the best solutions and what I would charge to create them for you.

 

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