Two key metrics here:

% of projects meeting launch date commitments set at 2 key go/no go checkpoints (project initiation, and commitment to develop).

Actual cycle times for above.

Both of the above can be benchmarked at industry level. 

I think that the following article could be interesting for you .

http://search.proquest.com/openview/6d02ad0e38c6a95f0be09d3cf70a4616/1?pq-origsite=gscholar 

Thank you Raouf , Unfortunately I am unable to get the PDF from the link . It'd help if you can send .

Please find enclosure an article on TTM.

Thank you  , I started looking the same topic with different angle  .. what are the key factors which led to some of the failures in the project  . Kindly share your views .. with preferences  [highest to lowest  ) from following

Factors

Unclear Objectives in group 

Changing Requirement 

Knowledge within team 

Collaboration 

Unrealistic scheduled  

Miscelleneous issues  

Based on internal analysis of slipped projects & why the projects slipped (%'s approximate):

Technical issues = 25%

Resource availability gap = 25%

New/changed requirements = 20%

Strategic decision = 15%

Underestimated effort = 10%

Financial/budget = 5%

Be careful what conclusion you draw, however.  The business question is: Where are the biggest opportunities to improve productivity & TTM?  Could be, for example, the biggest opportunity is to do a better job of leveraging IP so as to reduce duplication of engineering effort. The pareto above won't tell you that.  It represents performance gaps, not opportunity gaps.