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ISO 3951-4:2011
Sampling procedures for inspection by variables — Part 4: Procedures for assessment of declared quality levels- 발행일 : 2011-08-04
- 발행기관 : ISO
상세정보
| 분야 | ISO/TC 69/SC 5 : Acceptance sampling |
|---|---|
| 적용범위 | ISO 3951-4:2011 establishes sampling plans and procedures by variables that can be used to assess whether the quality level of an entity (lot, process, etc.) conforms to a declared value. The sampling plans have been devised so that their operating characteristic curves match those of the corresponding attributes plans in ISO 2859-4 as closely as possible, so that the choice between using sampling by attributes and sampling by variables is not influenced by attempts to increase the chance of accepting an incorrectly declared quality level. In this part of ISO 3951, there is a risk of between 1,4 % and 8,2 % of contradicting a correct declared quality level. The risk is 10 % of failing to contradict an incorrect declared quality level which is related to the limiting quality ratio. Sampling plans are provided corresponding to three levels of discriminatory ability, and for the cases of unknown and known process standard deviation. In contrast to the procedures in the other parts of ISO 3951, the procedures in ISO 3951-4:2011 are not applicable to acceptance assessment of lots. Generally, the balancing of the risks of reaching incorrect conclusions in assessment procedures will differ from the balancing in the procedures for acceptance sampling. ISO 3951-4:2011 may be used for various forms of quality inspection in situations where objective evidence of conformity to some declared quality level is to be provided by means of inspection of a sample. The procedures are applicable to entities such as lots, process output, etc. that allow random samples of individual items to be taken from the entity. The sampling plans provided are applicable, but not limited, to inspection of a variety of products such as: end items; components and raw materials; operations; materials in process; supplies in storage; maintenance operations; data or records; administrative procedures. The procedures are intended to be used when the quality characteristics are measurable variables that are independent and normally distributed, and where the quantity of interest is the fraction of items that are nonconforming. |
| 국제분류(ICS)코드 | 03.120.30 : 통계적 방법의 응용 |
| 페이지수 | 25 |
| Edition | 1 |
이력정보
| No. | 표준번호 | 표준명 | 발행일 | 상태 |
|---|---|---|---|---|
| 1 | ISO 3951-4:2011상세보기 | Sampling procedures for inspection by variables — Part 4: Procedures for assessment of declared quality levels | 2011-08-04 | 표준 |
관련상품
- ISO 3951-5:2006 - Sampling procedures for inspection by variables — Part 5: Sequential sampling plans indexed by acceptance quality limit (AQL) for inspection by variables (known standard deviation)
- ISO 3951-3:2007 - Sampling procedures for inspection by variables — Part 3: Double sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
- ISO 3951-2:2013 - Sampling procedures for inspection by variables — Part 2: General specification for single sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection of independent quality characteristics
- ISO 3951-1:2022 - Sampling procedures for inspection by variables — Part 1: Specification for single sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection for a single quality characteristic and a single AQL
- ISO 3951-6:2023 - Sampling procedures for inspection by variables — Part 6: Specification for single sampling plans for isolated lot inspection indexed by limiting quality (LQ)
다른 사람이 함께 구입한 상품
- ISO 295:2004 - Plastics — Compression moulding of test specimens of thermosetting materials
- BS EN 13887:2003 - Structural adhesives. Guidelines for surface preparation of metals and plastics prior to adhesive bonding.
- ISO 80000-4:2006 - Quantities and units — Part 4: Mechanics
- ISO 7500-1:2018 - Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1: Tension/compression testing machines — Calibration and verification of the force-measuring system
- ISO 2818:2018 - Plastics — Preparation of test specimens by machining
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