If checked, all members need to provide Start & End Time for each timesheet activity.
If unchecked, members can directly enter hours where Start & End Time is optional.
Time Sheet Approval
Members need to click “Submit for Approval” button in Timesheet posting page for approval submission where approved hours can be invoiced.
If unchecked, no approval process & all posted hours can be invoiced.
If Billable settings is checked, you can modify the task type as Billable / non billable.
Work hours in a day
You can specify the number of hours per day here where 8 hrs by default. This work hours in a day is validated in My time sheet week and month view for the members. Members who posted for the work hours specified and who failed to work can be differentiated.