Trend of NAM weights during the project lifecycle

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NAM weights can aid the project manager to choose the roght way for the future development phase.

A negative weights means that when corresponding value of the weight increases we have an Effort reduction. In this example the inheritance of attributes (and an optimal usage of them) give a gain in effort cost, while the cost for adding local attribute is a bib cost in the first phases of the project, but remain constant during the other.