Hi Swati ..
What you have done is good but it is not a matrix, it is flow of process with reasons assigned to it.
Matrix is a tool for analyzing effectiveness / to evaluate quality of the particular work or task, it is also used for finding reasons or keeping it as base line information you can do causal analysis to upgrade or improve the task each time.... so hope you got the idea....
For recruitment examples can be
Lead-time calculation for recruitment or particular position closure
Consultant’s evaluation or hit ratio,
Reason tracking for non conversion
Many more available for post recruitment ,exit & Training & development
So go ahead as you have all ready made why analysis to see that how you can evaluate what you want from each activity , you will get the idea
All the best
Regards
Sujit