Which is a QA measure to ensure prototype accuracy against the specification?

Which is a QA measure to ensure prototype accuracy against the specification?

• A. CAD design
• B. Mock-up models and mechanical systems
• C. Working drawings with tolerances
• D. Client feedback

Answer: (C)

Defining precise measurements and allowable variations on drawings provides a measurable standard. Working drawings with tolerances specify the exact dimensions, acceptable deviations, finishes, and fits for each part, so you can compare the actual prototype directly against the specification. This gives objective pass/fail criteria, guiding inspectors and machinists and allowing quick identification of any non-conforming features. It also helps reveal which parts need tighter control and where looser tolerances are acceptable, supporting consistent production and quality assurance. CAD designs are essential for planning and visualization, but they don’t by themselves verify physical accuracy against the spec. Mock-up models and mechanical systems can help explore form and function, yet without defined tolerances they can’t quantify conformity. Client feedback matters for meeting needs and expectations, but it isn’t a precise measure of Prototype accuracy relative to the specification.

Defining precise measurements and allowable variations on drawings provides a measurable standard. Working drawings with tolerances specify the exact dimensions, acceptable deviations, finishes, and fits for each part, so you can compare the actual prototype directly against the specification. This gives objective pass/fail criteria, guiding inspectors and machinists and allowing quick identification of any non-conforming features. It also helps reveal which parts need tighter control and where looser tolerances are acceptable, supporting consistent production and quality assurance.

CAD designs are essential for planning and visualization, but they don’t by themselves verify physical accuracy against the spec. Mock-up models and mechanical systems can help explore form and function, yet without defined tolerances they can’t quantify conformity. Client feedback matters for meeting needs and expectations, but it isn’t a precise measure of Prototype accuracy relative to the specification.