you can find answer for this question here

http://www.allinterview.com/classes/search.php?
cat=&subcat=&q=metrics&company=&qnum=1325&cno=155&page=1#aid

hi guest 

u hav gvn the link , for metrices , but u hav not mentioned 
types of metrices ...

types of metrices are 
project metrices 
process metrices

Metrics are generally classified into 2 types
1. Process metrics
2. Product metrics
b a metric used to measure the haracteristic of the 
methods, techniques and tools employed in eveloping, 
implementing and maintaining the software system.


Product metric: a metric used to measure the characteristic 
of the documentation and code. The metrics for the test 
process would include status of test activities against the
plan, test coverage achieved so far, amongst others. An 
important metric is the number ofdefects found in internal 
testing compared to the defect found in customer tests, 
which indicate the effectiveness of the test process itself.

Metrics meaures the strength of testing process

In otherwords it measures how much percentage of testing is 
complted

types of metrics

Functional covreage

Softwate release metric

Error discovery rate
stability trend chart

metrices are post evaluation of projects

effort variance
Effort variance= (planned effort-actual effort)/planned    
effort

planned effort = calculated time to complete the proj 
actual effort = actual time taken to complete the proj

requirement stability metrics can be based on phases or 
entire proj

requirement stability matric = no. of changes / total no. 
of requirements

hourly defect
   = total no. of defects / actual hours spend on that 
project