Describe a sampling plan and its role in CBM T6.

• A. Random collection of samples with no criteria.
• B. Focuses only on instrument calibration.
• C. Defines sample size, method, acceptance criteria, and statistical basis; ensures representativeness and decision validity.
• D. Is optional in CBM T6.

Answer: (C)

In CBM T6, a sampling plan is a structured approach to collecting data that will inform maintenance decisions. It specifies how many samples to take, how to select them, what constitutes an acceptable result, and the statistical basis for evaluating the data. This combination ensures the samples represent the actual population and that conclusions about component health or risk are valid and repeatable. The sample size affects how precise the conclusions are, the sampling method (random, stratified, systematic) guards against bias, and the acceptance criteria plus the statistical reasoning provide a clear decision threshold for actions like inspection, servicing, or replacement. Without this plan, data collection could be inconsistent, biased, or unsupported by sound reasoning. Options that focus only on calibration, or that describe random collection with no criteria, or that treat sampling as optional, don’t provide the necessary structure for reliable, data-driven maintenance decisions.