What is a basic sampling plan in the context of verification?

• A. Selecting all possible checks to determine if the instrument meets specs.
• B. A continuous real-time monitoring routine.
• C. A full-system audit of all components.
• D. Selecting a subset of checks to determine if the instrument meets specs.

Answer: (D)

A basic sampling plan in verification means you verify the instrument by checking a representative subset of the checks rather than testing every single item or dimension. You pick a manageable number of checks, apply predefined acceptance criteria, and if the results meet those criteria, you infer that the instrument meets specifications. This approach saves time and effort while still providing reasonable confidence in conformance, assuming the sample is chosen appropriately (often randomly and with a clear acceptance criterion). This differs from continuous real-time monitoring, which is ongoing, and from exhaustive full inspections or audits that examine everything.