Productivity in IT Divisions

I thought some years ago that Enterprise information system growth was more or less linear, according to a size factor. But getting experience, I soon discovered that inserting a new application in an existing information system comes to the same thing of creating a kind of turbulence which will take several months before to be stabilized.

Indeed, when counted in a stabilization process, applications may undergo several changes which do not change their initial function points count. Also when enterprises acquire or reengineer some of their information system parts, they use to implement COTS which are difficult to assess in function points. It results that measuring information system size is allways difficult and, even done, it will be a poor predictor for change which is rather related to business optimisation pace.

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