After testing this out in play, I found that A) 15 minutes might be a bit too long for a workday and B) assigning/tracking multiple tasks for each employee could get really arduous for the Manager.

In this new version:

• The workday has been updated to be 8 minutes long. This should make it easier to allow for more non-workday activities during the session.
• Each task has been assigned points, instead of a number of expected minutes. Each employee should be assigned only one task per workday. Quotas are now point-based. Manager performance is now judged based on the average number of points per employee.