Examples of Constraints

The following constraints limit work hours:

• Union agreements stipulate that no person work more than 10 hours of overtime in a week.

• Laws regulating worker safety restrict employees from working more than 12 hours a day.

• To keep costs down, management specifies that no service manager can authorize more than forty hours of overtime for each week for all of their employees.

• An engineer cannot work more than 45 hours for each week.

• An engineer cannot engage in an activity type (for example, working with hazardous materials) more than 4 hours in each day.

• Total workload must be less than 95%.

• Total workload must be greater than 60%.

• An engineer cannot travel more than 4 hours a day.

The following constraint limits timing of an activity: All waste disposal activities must start before 8:00 P.M.