Performance of Emp Work

Hi Team,

Need your valuable suggestions.

i am looking of performance of emp where we will watch how much he completed the work, new work,work flowed to next month for an year.

For example,
in jan, 10 new work has been assigned, 6 has been completed and 4 remain open.
in Feb, 15 new work has been assigned, 5 has been completed but the remaining will be 14 ( 15 New work in Feb +4 remain from Jan - 5 completed in Feb = 14)
same will be continue so on… for every month.

X- axis== Month

we have all the 3 (New,Closed,open) in data item X.

Thanks