This is the second post in a series on the subject of fatigue. In each post, I will focus on steps that management can take to address fatigue.

In the first post, I noted that employees don't think they need more than 7 hours sleep. Managers may want to post articles explaining the impact of sleep debt and the need for more than 7 hours of sleep a day. Just run a Google search for "sleep debt" and copy of few of the articles. If you can find anything by William Dement, he is the subject matter expert. I doubt that doing this will change employee behavior, but it may help to justify any actions management undertakes to address fatigue.

This post draws from a previous post in which I showed how early shift start times reduce the average hours of sleep for day shift workers (http://www.shift-schedule-design.com/Blog?m8:post=problems-with-early-morning-start-times). To summarize, people who start work at 7 a.m. sleep about 20 minutes more per night than those who start a 6 a.m.

Changing shift start times is difficult because people build their lives outside of work around the shift start and end times. When I review employee surveys, they often list the pros and cons of early start times. They say that the best thing about their current schedule is that they get off early, giving them time to do all sorts of things. Then they turn around and say that the worst thing about their schedule is having to get up so early and always feeling tired. How do you resolve this dilemma? It's both the best and worst features of your schedule - at the same time.

The other consideration with shift start times is traffic congestion. Later shift start times may require employees to spend extra time commuting. This takes time away from other activities. For those "other" activities to continue to take place, sleep is often the first thing sacrificed. Although many companies flex their hours to allow commuters to minimize time spent in traffic, this can be challenging for those with shiftwork operations. 

Early start times affect more than just shift workers. I've seen articles about the impact of early school start times on student performance. Teenagers have an internal clock that makes it difficult for them to be alert early in the morning, suggesting that learning would improve if schools started at 9 a.m. instead of 8 a.m.