time@work has an number of settings which can assist organisations in controlling the entry of hours.
Go to Timesheet Types and for a given timesheet you can optionally set:
Force Completion By Day – This will ensure that employees enter a minimum number of hours per day.
Force Completion By Period – This will ensure that employees enter a minimum number of hours per timesheet period (typically a week but not necessairly).
Maximum Daily Hours – This will limit the number of hours an employee can enter in a day.