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1. The features or mechanisms that control the execution of a *Process*, including process initiation, selection of process steps, selection of alternative steps, iteration of steps within a loop, and process termination.
2. Controlling mechanisms that ensure that a *Process* is conducted to maximum cost-effectiveness, including *Entry Criteria*, formal procedure specifications, and *Exit Criteria*.
In development or manufacturing processes, the rate of *Variations* that reveal themselves as work product *Defects* is in general inversely proportional to the degree in which the process is formalised and followed. Or, poor processes produce bugs …
See *Common Cause*, *Special Cause*.