In a comparison with similar industry projects, Callista has been rated consistently in the top 30% of companies when measuring development productivity. On some measures Callista is in the top 10% of companies.
A Function Point is a unit of measure of the business functionality of a system. These can be counted as a measure of the business functionality of a system irrespective of other characteristics like technology.
The International Software Benchmarking Standards Group (ISBSG) allows organisations to submit their function point counts and other project information for comparison to other like projects.