Section 2Preliminary Estimation Methods
Software cost estimates must be produced long before there is sufficient knowledge about a software project to be truly accurate. Two forms of preliminary estimation are discussed in this section:
Manual estimates using rules of thumb
Preliminary estimates using the approximation modes of commercial estimating tools
Accurate software estimating is too difficult for simple rules of thumb. Yet in spite of the availability of more than 50 commercial software-estimating tools, simple rules of thumb remain a ...
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