Which of the following is not a definition to determine a product's ability to operate as intended?

A quality control manager decides to increase his daily sample size from three to six. The size of the control band will:

A project manager recording project risks discovers that, in the past, the company's purchasing department experienced delays when purchasing critical project inputs. The project manager identifies that if this risk materializes it will increase the schedule by 50 percent.
What should the project manager do?

Analogous cost estimating relies on which of the following techniques?

What is the definition of project plan execution?