It´s importante to note that COCOMOII needs to be calibrated to local data in order to produce good estimates. If you use COCOMOII with its own productivity constants you are assuming you are working on a DoD like software project. If you want to estimate using COCOMOII on an early stage you can use a 100 SLOC for each function point. To estimate the number of function points you can relate 35 FP for each data requirement mantained by the system and 15 FP for each data requirement just refereced by the system.
Comparisons and advocacy
What would Moodle cost if developed in-house: SLOCCount: over 6M
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