The measurement culture at Level 3 also is not
often well understood. People may not really understand why they are collecting
the metrics they collect??”only that they are ???required??? by the model, so that??™s why
they are collected. The metrics may not be studied for consistency and clarity, or
may not be closely analyzed to determine why the numbers are inconsistent, and
Understanding Maturity Level 4: Quantitatively Managed n 111
whether that represents a potential problem or not. Because the numbers can be
???wild,??? management decisions made using the numbers can be pretty much off
base. And with inconsistent data, you really can??™t compare the performance of several
projects against one another to truly analyze trends.
At Level 4, managers and analysts must use the data, and apply statistical and
quantitative techniques to help monitor activities, identify potential problems, and
note areas that need attention. The instructions for the CMM for Software at Level
4 said basically keep it simple. The measurements here in the CMMI, and suggested
techniques, are very sophisticated and are more diffi cult to implement.
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