I think the problem is that they looked at completed projects. So if you were productive Tue-Fri, maybe you still need to write some comments or docs to complet

I think the problem is that they looked at completed projects. So if you were productive Tue-Fri, maybe you still need to write some comments or docs to complete the task which is perfect for a Monday morning. Looking at hourly data, number of completed tasks should be a measure for low productivity.