I'm thying to measure efficiency (NOT effectiveness).
To measure efficiency I have to divide "size of work" by "size of resources used".
What's Software Mainenance Service?
We have the project.
Project Team maintains defined application(s) during defined period.
Application is in production environment.
Developers process requests including in general:
- Help Desk support;
- Changes without code change;
- Solving problems with code change;
Are you attempting to create a corelation between scope of effort (guessing that is what "size of work" is) and required resources to be applied (again, guessing that is what "size of resources used" is)?
As it seems that at least three of us are scratching our heads over what you are asking, would rephrasing the question (using complete sentences in place of bullet points and putting the question into context of the need) help?
"Size of resources used" generally can be measured as actual effort (in pm or ph)
But how can I measure "size of work" for software maintenance project?
No problem in other cases, for example:
- if you develop SW you can measure the size of work in FPs or LOCs
- if you mine for mineral you can measure the size of work in tons of mineral
- if you produce balls for bearings you can measure the size of work as balls quantity (in general).