15 Acceptance Sampling

# 15 Acceptance Sampling - Lesson 15 Acceptance Sampling a...

This preview shows pages 1–7. Sign up to view the full content.

15 - 1 a form of inspection applied to lots or batches of items before or after a process to judge conformance to predetermined standards Lesson 15 Acceptance Sampling

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
15 - 2 Acceptance Sampling is very useful when . Large numbers of items must be processed in a short amount of time . The cost of “passing defectives” is low . Fatigue/boredom is caused by inspecting large numbers of items Acceptance Sampling . Destructive testing is required
15 - 3 Sampling Plans specify the lot size, sample size, number of samples and acceptance/rejection criteria. Sampling plans involve . Single sampling . Double sampling . Multiple sampling Random sample Lot Sampling Plans

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
15 - 4 Single Sampling Plan A Single Sampling Plan is one where . A representative sample of n items is drawn from a lot size of N items. . Each item in the sample is examined and classified as good/defective . If the number of defective exceeds a specified rejection number ( C - cut off point ) the whole lot is rejected; otherwise the whole lot is accepted Rando m sample (n items) Lot (N items) Rando m sample (n items) Lot (N items)
15 - 5 A Double Sampling Plan allows the opportunity to take a second sample if the results of the original sample are inconclusive. . Specifies the lot size, size of the initial sample, the accept/reject/inconclusive criteria for the initial sample ( CL - lower level of defectives, CU - upper level of defectives ) . Specifies the size of the second sample and the acceptance rejection criteria based on the total number of defective observed in both the first and second sample ( CT- total allowable defectives ) It works like the following example Double Sampling Plan

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
First Random sample Lot CL CU First sample inconclusive, take second sample Reject Lot
This is the end of the preview. Sign up to access the rest of the document.

## 15 Acceptance Sampling - Lesson 15 Acceptance Sampling a...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online