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Chapter 15: B. Sampling 161
3.2 If the inspector finds i consecutive units free of nonconformities,
the frequency f is reduced to f/2
3.2.1. If one nonconformity is found, the inspector switches
back to 100 percent inspection
3.2.2. If the inspector finds i consecutive units free of
nonconformities, the frequency f is reduced to f/4
3.2.2.1. If one nonconformity is found, 100 percent
inspection is reinstated
CSP-V plans work the same way as CSP-T plans but with reduced i instead of
reduced f. The procedure is as follows:
1. Start with 100 percent inspection
2. When i (clearance number) consecutive number of units are found
free of nonconformities, 100 percent inspection is then substituted with
sampling inspection
3. A fraction of f units is randomly selected and then inspected
3.1. If one nonconformity is found, the inspector reinstates 100
percent inspection
3.2. If the inspector finds i consecutive units free of nonconformities,
the sampling inspection continues with the same fraction f
3.2.1. If one nonconformity is found, the inspector switches
back to 100 percent inspection
3.2.2. If the inspector finds i/3 consecutive units free of
nonconformities, the sampling inspection continues with
the same fraction f
Part III.B