Unapproved overtime can be really irritating for a manager. You perfect the schedule so that your employees won’t make overtime and so that you can afford your payroll at the end of the period. But somehow your employees sabotage your efforts.
When employees clock in before their scheduled shift, they start accumulating minutes. These minutes add up to hours and, eventually, this tips them into overtime. You don’t want your employees earning overtime when you have an adequate workforce of full-time and part-time employees.