Dear Dhanya,
Maintenance Manager or otherwise, you need to first identify measures of performance for each department. You may prepare performance report based on these KPIs. Roughly following are the KPIs for Maintenance Manager:
a) Equipment availability in %
b) OEE
c) Total Maintenance cost against total production cost
d) Total Maintenance cost against total sales revenue
e) Value of Inventory of Spares parts against total stock value
f) Total loss of man days because of equipment downtime
What I have given about are the general KPIs. Further these need to be customised according to your business or company requirement. It would require deep study of the systems and processes of your company.
In fact what you need is establishment comprehensive
Performance Management System (PMS) in your company. If you are from HR then why you are preparing the performance or productivity report on behalf of Maintenance Manager is not understood. Why he is not doing it? If you wish, you may hire my services to establish PMS. Click on the hyperlink to know more about my services.
Thanks,
Dinesh Divekar