Usually,
the steps in this series of events would be input into a tool that would graphically
demonstrate the time it takes for each step to occur and where any problems
(such as slower speeds) occur. The results would be reviewed and the bottlenecks
studied to see how to improve performance.
What is reverse engineering? Reverse engineering is when you look at the results
of something and then you take it apart to figure out how it was made or how it
works. Then, you either put it back together the same way or you design a new,
improved way and put it back together that way. So, you are working backward.
Let??™s say we are trying to figure out how to make a watch. We take it apart to see
how all of the pieces fit together, and then we (try) to put it back together. Or, let??™s
say we have an old, legacy system; perhaps a payroll system. We need to incorporate
the latest tax deduction strategy implemented by the federal government or some
other sort of law or regulation. The payroll system is very old and very complicated,
18 n Interpreting the CMMI
not well documented, and not well managed when it comes to changes.
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