Difficulties with parametric estimation techniques
techniques such as COCOMO is due to the fact that quite often task completion
times for software development are not additive. For example, if coding up a
new module, the time to design, program and unit test the item may be rather
high (say a few days).
However, additional similar modules could take less time
(say a matter of hours) due to familiarity with requirements and re-use of
existing code.
Do you, have any suggestions for how the effect of extensive
code reuse can be factored in to parametric estimation methods?
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