Chapter 10S - Acceptance sampling. After studying this chapter you will be able to: Explain the purpose of acceptance sampling, compare and contrast single- and multiple-sampling plans, describe what an operating characteristic curve does, determine the average outgoing quality of inspected lots. | Acceptance Sampling Supplement 10 Copyright © 2015 McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of McGraw-Hill Education. 1 You should be able to: LO Explain the purpose of acceptance sampling LO Compare and contrast single- and multiple-sampling plans LO Describe what an operating characteristic curve does LO Determine the average outgoing quality of inspected lots Supplement 10: Learning Objectives Acceptance sampling A form of inspection applied to lots or batches of items before or after a process, to judge conformance with predetermined standards May be applied to both attribute and variable inspection Acceptance Sampling LO Purpose of Acceptance Sampling The purpose of acceptance sampling is to decide whether a lot satisfies predetermined standards Lots that satisfy these standards are passed or accepted Rejected lots may be subjected to 100 percent inspection In the case of purchased | Acceptance Sampling Supplement 10 Copyright © 2015 McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of McGraw-Hill Education. 1 You should be able to: LO Explain the purpose of acceptance sampling LO Compare and contrast single- and multiple-sampling plans LO Describe what an operating characteristic curve does LO Determine the average outgoing quality of inspected lots Supplement 10: Learning Objectives Acceptance sampling A form of inspection applied to lots or batches of items before or after a process, to judge conformance with predetermined standards May be applied to both attribute and variable inspection Acceptance Sampling LO Purpose of Acceptance Sampling The purpose of acceptance sampling is to decide whether a lot satisfies predetermined standards Lots that satisfy these standards are passed or accepted Rejected lots may be subjected to 100 percent inspection In the case of purchased goods, they may be returned for credit or replacement LO Single-Sampling Plan Single-sampling plan One random sample is drawn from each lot Every item in the sample is inspected and classified as “good” or “defective” If any sample contains more than a specified number of defectives, c, the lot is rejected LO Double-Sampling Plan Allows the opportunity to take a second sample if the results of the initial sample are inconclusive Two values are specified for the number of defective items A lower level, c1 An upper level, c2 If the number of defectives in the first sample is ≤ c1 the lot is accepted and sampling is terminated > c2 the lot is rejected and sampling is terminated Between c1 and c2 a second sample is collected The number of defectives in both samples is compared to a third value, c3 If the combined number of defectives does not exceed this value, the lot is accepted; otherwise, it is rejected Double-Sampling Plan LO Multiple-sampling plan Similar to a .
