Employees can clock on to different pay categories during the day. You can then analyse attended time by pay category for each employee or department over any period of time. You can also use pay categories to set up different payment schemes. Each category can have its own pay rate or factor. If the category pay rate is zero then the employee will continue to be paid at their default rate.
Employees can also clock on to different pay categories whilst working on a job.
Working at different machines. Off-site at customer.