Today, we're going to look at employee work schedules at a car dealership. The manager of this dealership runs the sales department 7 days a week for 12 hours a day (8 a.m. to 8 p.m.). He runs the parts department, service writers, and mechanics for 10 hours a day (8 a.m. to 6 p.m.) on Mon-Fri, but wants to add Saturday. He doesn't need a schedule for the administrative staff since they work 8 hours a day Mon-Fri.
Like many dealers, he hasn't kept data on the volume of customers by time of day or day of the week. He says the volume fluctuates too much, though it's always busier on weekends. He wants at least 2 salespeople during the week and 3 or 4 salespeople on the weekends. For parts and service writing, he wants 2 people Mon-Sat. For mechanics, he wants 6 people Mon-Sat.
Salespeople
The current schedule for the sales people consists of fixed 8-hour shifts with fixed days of work. Eight salespeople are needed to do this: four on days (Employees A, B, C, and D) and four on afternoons (Employees E, F, G, and H). The schedule is shown below. Employee A works the day shift (d8) from 8 a.m. to 4 p.m. every Saturday through Wednesday, Employee B works the day shift Thursday through Monday, and Employee F works the afternoon shift (a8) from 12 noon to 8 p.m. every Thursday through Monday.
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Current Schedule
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Employee
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Sat
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Sun
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Mon
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Tue
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Wed
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Thu
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Fri
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Hours
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A
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d8
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d8
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d8
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d8
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d8
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-
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-
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40
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B
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d8
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d8
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d8
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-
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-
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d8
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d8
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40
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C
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d8
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d8
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d8
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d8
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-
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-
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d8
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40
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D
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d8
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d8
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-
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-
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d8
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d8
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d8
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40
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E
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a8
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a8
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a8
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a8
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a8
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-
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-
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40
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F
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a8
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a8
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a8
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-
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-
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a8
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a8
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40
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G
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a8
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a8
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a8
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a8
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-
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-
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a8
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40
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H
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a8
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a8
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-
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-
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a8
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a8
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a8
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40
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Average
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40
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Key:
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d8 = 8-hour day shift (8am-4pm)
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a8 = 8-hour afternoon shift (12pm-8pm)
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Coverage:
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Sat
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Sun
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Mon
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Tue
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Wed
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Thu
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Fri
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8a - 12p
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4
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4
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3
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2
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2
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2
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3
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12p - 4p
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8
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8
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6
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4
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4
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4
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6
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4p - 8p
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4
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4
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3
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2
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2
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2
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3
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The resulting coverage is shown above. It produces higher coverage on the weekends, but it has a 4-hour overlap that is unnecessary. If 12pm to 4pm was a particularly busy period, the overlap would be great. But this isn't a particularly busy time of the day for sales.
Do the employees like this schedule? Well, they like working the same shift and the same days all the time, but they hate never getting a weekend off.
We were able to convince the manager that 12-hour shifts would be a better choice. Here's the schedule we designed.
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Proposed Schedule
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Emp. / Week
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Sat
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Sun
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Mon
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Tue
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Wed
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Thu
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Fri
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Hours
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A / Week 1
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D12
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D12
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D12
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-
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-
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-
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-
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36
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B / Week 2
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D12
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D12
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-
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-
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D12
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D12
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-
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48
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C / Week 3
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-
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-
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D12
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D12
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-
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-
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D12
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36
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D / Week 4
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D12
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D12
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-
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-
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D12
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D12
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-
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48
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E / Week 5
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D12
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D12
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D12
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-
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-
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-
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-
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36
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F / Week 6
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-
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-
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-
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D12
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D12
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-
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D12
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36
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G / Week 7
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D12
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D12
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-
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-
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-
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-
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D12
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36
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Average
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39.4
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Key:
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D12 = 12-hour day shift (8am-8pm)
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Coverage:
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Sat
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Sun
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Mon
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Tue
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Wed
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Thu
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Fri
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8a - 8p
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5
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5
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3
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2
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3
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2
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3
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With this schedule, all the employees are on the same shift, but they work different days each week. This is called a fixed shift schedule with rotating days of work. Each employee starts in the week shown for them. After finishing this initial week, they rotate to the next week of the schedule. Employee A moves from Week 1 to Week 2, B moves from Week 2 to Week 3, and so on. Employee G moves from Week 7 up to Week 1. All the sales people would work the same 7-week pattern. It's just that they would be in different weeks of that pattern.
Unlike the current schedule with 8 salespeople, only 7 salespeople are needed with the 12s. The coverage is better too. The 4 hours of overlapping shifts is eliminated and they would have 5 people working both Saturday and Sunday instead of 4 people. The employees should be happier as well. They would get 2 weekends off every 7 weeks (weeks 3 and 6 of the schedule). There are also two 4-day breaks (Weeks 1 and 7) and one 7-day break (Week 5 into Week 6).
Parts, Service Writers, Mechanics
The current schedule for these three positions is Monday to Friday for 10 hours a day (8 a.m. to 6 p.m.). The manager organized them into 3 teams, with each team consisting of 1 Parts Person, 1 Service Writer, and 3 Mechanics.
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Current Schedule
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Team
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Sat
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Sun
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Mon
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Tue
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Wed
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Thu
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Fri
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Hours
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A
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-
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-
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-
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D10
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D10
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D10
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D10
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40
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B
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-
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-
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D10
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D10
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D10
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D10
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-
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40
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C
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-
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-
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D10
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D10
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-
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D10
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D10
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40
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Average
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40.0
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Key:
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D10 = 10-hr day shift (8am-6pm)
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Coverage:
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Sat
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Sun
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Mon
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Tue
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Wed
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Thu
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Fri
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8a - 6p
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0
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0
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2
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3
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2
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3
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2
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Team A worked the 10-hour shift Tue-Fri, Team B worked it Mon-Thu, and Team C worked it Mon-Tue and Thu-Fri. The biggest problem was that all 3 teams worked every Tuesday and Thursday - which are not busy days. Employees liked the schedule, though Team C complained that they didn't get a 3-day weekend off like the other teams did.
We created a new schedule for Mon-Sat coverage with rotating days of work so that the employees wouldn't get stuck working every single weekend. Here's what we designed.
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Proposed Schedule
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Team / Week
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Sat
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Sun
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Mon
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Tue
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Wed
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Thu
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Fri
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Hours
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A / Week 1
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D10
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-
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D10
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D10
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-
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D10
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D10
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50
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B / Week 2
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D10
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-
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D10
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D10
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D10
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-
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-
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40
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C / Week 3
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-
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-
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-
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-
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D10
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D10
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D10
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30
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Average
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40.0
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Key:
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D10 = 10-hr day shift (8am-6pm)
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Coverage:
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Sat
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Sun
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Mon
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Tue
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Wed
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Thu
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Fri
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8a - 6p
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2
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0
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2
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2
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2
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2
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2
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Without adding any staff, we rearranged the pattern so 2 teams were working every day from Mon-Sat. The only sacrifice was one 50-hour work week and one 30-hour work week. This could be resolved by moving the Tue shift in Week 1 to Week 3, however, that would leave the Mon shift in Week 1 sitting out there all by itself. This is poor scheduling because it encourages employees to call in sick or take vacation on that day to bridge the time off before and after that day.
The advantages of this new schedule are that it uses the same number of employees, but adds Saturdays and gets rid of the extra coverage on Tue and Thu. The manager was extremely pleased with this, since he got what he wanted for a small price – the overtime for one team every week (though this was offset partially by the 30-hour Week 3).
The employees didn't like the idea of rotating and working Saturdays, but they did like getting a 6-day weekend off every 3 weeks.
Conclusions
Sometimes it helps to have an outsider take a fresh look at your business, and especially your employee work schedule. The manager of this dealership would have lived with ineffective schedules and incurred unnecessary costs for years if he hadn't decided to expand the coverage to include Saturdays and contacted us for assistance.
We showed him how to improve the sales coverage and to do it with fewer people. We showed him how to add Saturday coverage for Parts, Service Writers, and Mechanics without adding more staff. In most cases, the employees were happy with the changes. They resisted the change to schedules that rotated the days of work, but they liked the longer breaks and opportunities for weekends off.