Effective application of sampling plans require that sample

Effective application of sampling plans require that sample selection be accomplished in the following manner. Sample is selected from the lot at random sample is selected. where apparent nonconforming parts are included sample is selected from the large lots, after the lots have been stratified (a) and (b) (a) or (c) Returning rejected lots to the producer for rectification, has the following advantage It provides a motivating factor for the producer to improve quality It is a cheaper alternative than rectifying it in the consumer\'s plant It helps expedite the rectification process It causes less production disruption in the consumers plant Operating Characteristic OC curve represents the following relationship: Probability of Acceptance against the number of Sampling Trials Number of Parts Inspected against the Probability of Acceptance Probability of Acceptance against the type of Sampling Inspection Plan Probability of Acceptance against lot Quality Type A OC curve is based on the following assumption, Inspected lots come from a very large population Inspected lots come from a finite population Inspected Lots come from a blend of populations Inspected lots are stratified before sampling inspection Type B OC curve is based on the following assumption a Inspected lots come from a very large population Inspected lots come from a finite population Inspected lots come from a blend of populations Inspected lots are stratified before sampling inspection. The OC curve provides the following measure of performance about lot Sampling Inspection plans: The costs incurred in the inspection process The expected number of parts to be inspected The degree to which manufacturers can rely on their internal control process The power by which the sampling plan responds to change in the lot quality Analysis of the OC curve shows that sampling plans with fixed sample size are closely matched m performance over a range of lot Sizes. Analysis of the OC curve shows that sampling plans performance do not change with the increase in sample size: Analysis of the OC curve Shows that; as the acceptance number(c) gets smaller, the sampling plan discrimination, regarding marginal quality, improves:

Solution

1) Answer is e

During the Production the material is produced at different manner due to this for sample selection we taken the material randomly from the production lot. For eg: 1 Nos from 10 Pcs.

2) d

During rejection of the lot mostly the material is send back to the producer for recfication because it helps the following advantages to conumer:-

a) Improve quality at producer end in future (Control production parameter)

3) a (Accepatance vs Lot defective, which occur during sampling trial)

4) b

5) c

6) c

7) False (This graph is genetrated to fix the quality & process control at manufacture end)

8)True

9) True