The quickest and most cost-effective way to inspect software is to read it. Studies have shown that reading source code typically catches 60% of defects, is 20% more effective than testing and that each hour spent reading avoids 33 hours of maintenance work.
There are three perspectives from which a program can be read:
By their nature, these aspects are difficult to verify. It is also important to note that in inspecting for CfCs, an assessor is being asked for his professional opinion, which is inevitably subjective. However, the goal of this more subjective level of assessment is precisely to initiate discussion with the programmer, with a view to raising awareness of overall quality issues during the development process.
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