Gentlemen,

I have been assigned a new task, to make a score card for Key Performance
Indicators. I have asked the concerned departments for the data.

Now what is this term rolling average/

My data is as follows

Data : safety valve caliberation

Month jan feb march apr

Planned 10 14 15 10
caliberated 5 15

Pls forgive my ignorance but this is all new to me how do I get a rolling
average? this data is just collected from Jan 2010

afd