LTPD = definition of a threshold bad lot.
The sampling plan is designed around the AQL/LTPD such that it defines:
1. MAX chance of ACCEPTING lots of quality that is equal or worse than LTPD. This chance/risk is BETA or CONSUMER's RISK.
2. MAX chance of REJECTING lots of quality that is equal or better than AQL. This chance/risk is ALPHA or PRODUCER's RISK.
Alpha (Probability of rejection) is usually set to 0.05. This equates to 95% chance/confidence of acceptance.
Beta (Probablility of acceptance) is usually set to 0.10. This equates to 90% chance/confidence of rejection.
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