Part II
Observation
A man should look for what is, and not for what he thinks should be.
—Albert Einstein
As discussed in Part I, measurement is the act of ascertaining the size, amount, or degree of something.
Observation is a broader term than measurement. It refers to watching something carefully and attentively, but covers multiple aspects. A measurement determines a numerical value (with units) of a single aspect, while an observation encompasses many aspects at once, some of which may be unexpected. An observation may also encompass a time sequence of events—the dynamics.
This second part presents techniques for observing the behavior of time-constrained software. Good code logs the start and stop times of every transaction and subtransaction, ...
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