The standard for project management

Statistical sampling. 

Statistical sampling involves choosing part of a population of interest for inspection (for 

example, selecting 10 engineering drawings at random from a list of 75). The sample is taken to measure controls 

and verify quality. Sample frequency and sizes should be determined during the Plan Quality Management process.

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Questionnaires and Surveys.

 Surveys may be used to gather data about customer satisfaction after the 

deployment of the product or service. The cost regarding defects identified in the surveys may be considered 

external failure costs in the COQ model and can have extensive cost implications for the organization.

8.3.2.2 DATA ANALYSIS

Data analysis techniques that can be used for this process include but are not limited to:

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