The standard for project management

Lessons learned register. 

Described in Section 4.4.3.1. Lessons learned earlier in the project with regard to 

managing quality can be applied to later phases in the project to improve the efficiency and effectiveness of 

managing quality.

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Quality control measurements. 

Described in Section 8.3.3.1. Quality control measurements are used to analyze 

and evaluate the quality of the processes and deliverables of the project against the standards of the performing 

organization or the requirements specified. Quality control measurements can also compare the processes used 

to create the measurements and validate actual measurements to determine their level of correctness.

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