I am writing this article as a sequel to the Measuring Programming Progress By Lines Of Code article. As I already stated there, software Managers want to have some metric to estimate their workers. They are always seeking for a a precise and measurable way to know the programming progress and the developers productivity and performance. If you read the previous article, you know that I don’t think that counting the lines of the program source code is an efficient metric at all. Let me please talk about another common metric - measuring the amount of extra hours a software developer has done.