User/Doer wise Report of Due Date & Time Vs Actual Completion Date & Time

create csv report of user which we can download for specific time internal say monthly quarterly and check how many task user has completed on time and how many completed late based on Planned Time Vs Actual Time of particular task. For example , we have assigned 80 task in a month to a particular user then I want to see how many task from 80 he/she has completed on time and how many completed late and by what time?