What are procedures can apply to avoid excess leave taking by staffs without valid reasons?

Targeted job with given timelines will avoid the excess leaves without reason. this is pertinent to mention that target should be given to staff with possible decisive powers. 

HR must have their own rules and regulation when it comes to leave as well as the compensation of it. they must have a full control to avoid excess leave by imposing rules of salary deduction, and the effect is immediate.