Enter values for acceptance sampling
Explanation
This activity is used to enter values to be used for acceptance sampling when
creating the analyses from the control plan.
To enter values for exeptance sampling edit the control plan template
header or control plan header and update the Standard,
Sampling Plans, AQL and Inspection Level fields in the Acceptance
Sampling Parameters section.
Standard
- ISO 2859-1:1999 - Sampling procedures for inspection by attributes -
Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection.
- ISO 2859-3:2005 - Sampling procedures for inspection by attributes -
Part 3: Skip-lot sampling procedures
Sampling Plans
- With a single sampling plan only one sample is drawn, and acceptance
is decided from the number of nonconforming items in that sample. With a
double sampling plan, the sample size is smaller. But the number of nonconforming
items may fall in between the acceptance and rejection numbers requiring
a second sample to be drawn to decide on acceptance or rejection. With a
multiple sampling plan, the sample size is even smaller, but up to five
consecutive samples can be drawn to decide on acceptance or rejection.
Acceptance Quality Limit (AQL)
- The AQL is expressed as percentage of nonconforming items. For a given
AQL, the great majority of lots submitted will be accepted if the number
of nonconforming items is not greater than the AQL.
Inspection Level
- The inspection level sets the relative amount of inspection. There are
three general inspection levels, I, II and III. Unless otherwise specified,
level II shall be used. I is used when less discrimination is required and
III is used when greater discrimination is required. There are also four
additional special levels, S-1, S-2, S-3 and S-4 which may be used when
small sample sizes are necessary and larger sampling risks can be tolerated.
Prerequisites
A control plan template header or a control plan
header for manufacturing or purchasing must exist.
System Effects
Values for acceptance sampling are defined on the control plan header.
Note: You also need to use the acceptance sampling inspection code
on appropriate control plan lines.