Hi Salma,
your query doesnot clearly states you current role in the organization. If it is your responsibilty area or not.
However, as suggested by many others, a muster-roll could be prepared, but before getting to do any such work, you must first work out on apolicy, which keeps a check on the time-on & time-out of the employees.
Also, if no such policy has been ever designed, it would be difficult to bring about a change, so keeping in mind every aspect, you could sit with your seniors in the organization and work out on a employee friendly and followable strategy to get the punctuality and time limitations checked.
Also, as i understand, this is just an example that you quoted, for other things also, there arent any well drafted and implemented policies and processes.
You must first ask your management, what and where do they want to start from to streamline the working of the organization. Since policies and processes are not a one-day job....it requires a lot of mixing matching and thinking, with all practical usage of the same.
Start from the most important and go your way through...
wish you all the Best!!!!