{"id":356910,"date":"2024-10-20T01:14:30","date_gmt":"2024-10-20T01:14:30","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-3951-12013\/"},"modified":"2024-10-26T01:39:40","modified_gmt":"2024-10-26T01:39:40","slug":"bs-iso-3951-12013","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-3951-12013\/","title":{"rendered":"BS ISO 3951-1:2013"},"content":{"rendered":"

This part of ISO 3951 is primarily designed for use under the following conditions:<\/p>\n

    \n
  1. \n

    where the inspection procedure is to be applied to a continuing series of lots of discrete products all supplied by one producer using one production process;<\/p>\n<\/li>\n

  2. \n

    where only a single quality characteristic, x<\/i>, of these products is taken into consideration, which must be measurable on a continuous scale;<\/p>\n<\/li>\n

  3. \n

    where production is stable (under statistical control) and the quality characteristic, x<\/i>, is distributed according to a normal distribution or a close approximation to the normal distribution;<\/p>\n<\/li>\n

  4. \n

    where a contract or standard defines a lower specification limit, L<\/i>, an upper specification limit, U<\/i>, or both; an item is qualified as conforming if and only if its measured quality characteristic, x,<\/i> satisfies the appropriate one of the following inequalities:<\/p>\n

      \n
    1. \n

      x<\/i> \u2265 L<\/i> (i.e. the lower specification limit is not violated);<\/p>\n<\/li>\n

    2. \n

      x<\/i> \u2264 U<\/i> (i.e. the upper specification limit is not violated);<\/p>\n<\/li>\n

    3. \n

      x \u2265 L<\/i> and x<\/i> \u2264 U<\/i> (i.e. neither the lower nor the upper specification limit is violated).<\/p>\n<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n

      Inequalities 1) and 2) are called cases with a single specification limit and 3), a case with double specification limits.<\/p>\n

      Where double specification limits apply, it is assumed in this part of ISO 3951 that conformance to both specification limits is equally important to the integrity of the product. In such cases, it is appropriate to apply a single AQL to the combined percentage of a product outside the two specification limits. This is referred to as combined control.<\/p>\n

      PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
      PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
      2<\/td>\nNational foreword <\/td>\n<\/tr>\n
      8<\/td>\nForeword <\/td>\n<\/tr>\n
      10<\/td>\nIntroduction <\/td>\n<\/tr>\n
      13<\/td>\n1 Scope
      2 Normative references <\/td>\n<\/tr>\n
      14<\/td>\n3 Terms and definitions <\/td>\n<\/tr>\n
      17<\/td>\n4 Symbols <\/td>\n<\/tr>\n
      18<\/td>\n5 Acceptance quality limit (AQL)
      5.1 Concept <\/td>\n<\/tr>\n
      19<\/td>\n5.2 Use
      5.3 Specifying AQLs
      5.4 Preferred AQLs
      5.5 Caution
      5.6 Limitation
      6 Switching rules for normal, tightened, and reduced inspection <\/td>\n<\/tr>\n
      20<\/td>\n7 Relation to ISO 2859\u20111
      7.1 Similarities
      7.2 Differences <\/td>\n<\/tr>\n
      21<\/td>\n8 Consumer protection
      8.1 Use of individual plans
      8.2 Consumer\u2019s risk quality (CRQ) tables
      8.3 Producer\u2019s risk tables
      8.4 Operating characteristic (OC) curves <\/td>\n<\/tr>\n
      22<\/td>\n9 Allowing for measurement uncertainty
      10 Planning
      11 Choice between variables and attributes <\/td>\n<\/tr>\n
      23<\/td>\n12 Choice between the s-method and \u03c3-method
      13 Choice of inspection level and AQL
      14 Choice of sampling scheme
      14.1 Standard plans <\/td>\n<\/tr>\n
      24<\/td>\n14.2 Special plans
      15 Preliminary operations <\/td>\n<\/tr>\n
      25<\/td>\n16 Standard procedures for the s-method
      16.1 Obtaining a plan, sampling, and preliminary calculations
      16.2 Acceptability criteria for single specification limits <\/td>\n<\/tr>\n
      27<\/td>\n16.3 Graphical method for a single specification limit <\/td>\n<\/tr>\n
      28<\/td>\n16.4 Acceptability criterion for combined control of double specification limits
      16.4.1 General
      16.4.2 Procedure for sample size 3 <\/td>\n<\/tr>\n
      30<\/td>\n16.4.3 Procedure for sample size 4 <\/td>\n<\/tr>\n
      31<\/td>\n16.4.4 Procedure for sample sizes greater than 4 <\/td>\n<\/tr>\n
      33<\/td>\n17 Standard procedures for the \u03c3-method
      17.1 Obtaining a plan, sampling, and preliminary calculations
      17.2 Acceptability criteria for a single specification limit <\/td>\n<\/tr>\n
      34<\/td>\n17.3 Acceptability criterion for combined control of double specification limits <\/td>\n<\/tr>\n
      35<\/td>\n18 Procedure during continuing inspection <\/td>\n<\/tr>\n
      36<\/td>\n19 Normality and outliers
      19.1 Normality
      19.2 Outliers
      20 Records
      20.1 Control charts
      20.2 Lots that are not accepted
      21 Operation of switching rules <\/td>\n<\/tr>\n
      37<\/td>\n22 Discontinuation and resumption of inspection
      23 Switching between the s-method and \u03c3-method
      23.1 Estimating the process standard deviation <\/td>\n<\/tr>\n
      38<\/td>\n23.2 State of statistical control
      23.3 Switching from the s -method to the \u03c3 -method
      23.4 Switching from the \u03c3 -method to the s -method <\/td>\n<\/tr>\n
      40<\/td>\n24 Charts B to R \u2014 Operating characteristic curves and tabulated values for single sampling plans, normal inspection: s-method
      24.1 Operating characteristic curves and tabulated values for sample size code letter B: s\u2011method <\/td>\n<\/tr>\n
      41<\/td>\n24.2 Operating characteristic curves and tabulated values for sample size code letter C: s\u2011method <\/td>\n<\/tr>\n
      42<\/td>\n24.3 Operating characteristic curves and tabulated values for sample size code letter D: s\u2011method <\/td>\n<\/tr>\n
      43<\/td>\n24.4 Operating characteristic curves and tabulated values for sample size code letter E: s\u2011method <\/td>\n<\/tr>\n
      44<\/td>\n24.5 Operating characteristic curves and tabulated values for sample size code letter F: s\u2011method <\/td>\n<\/tr>\n
      45<\/td>\n24.6 Operating characteristic curves and tabulated values for sample size code letter G: s\u2011method <\/td>\n<\/tr>\n
      46<\/td>\n24.7 Operating characteristic curves and tabulated values for sample size code letter H: s\u2011method <\/td>\n<\/tr>\n
      47<\/td>\n24.8 Operating characteristic curves and tabulated values for sample size code letter J: s\u2011method <\/td>\n<\/tr>\n
      48<\/td>\n24.9 Operating characteristic curves and tabulated values for sample size code letter K: s\u2011method <\/td>\n<\/tr>\n
      49<\/td>\n24.10 Operating characteristic curves and tabulated values for sample size code letter L: s\u2011method <\/td>\n<\/tr>\n
      50<\/td>\n24.11 Operating characteristic curves and tabulated values for sample size code letter M: s\u2011method <\/td>\n<\/tr>\n
      51<\/td>\n24.12 Operating characteristic curves and tabulated values for sample size code letter N: s\u2011method <\/td>\n<\/tr>\n
      52<\/td>\n24.13 Operating characteristic curves and tabulated values for sample size code letter P: s\u2011method <\/td>\n<\/tr>\n
      53<\/td>\n24.14 Operating characteristic curves and tabulated values for sample size code letter Q: s\u2011method <\/td>\n<\/tr>\n
      54<\/td>\n24.15 Operating characteristic curves and tabulated values for sample size code letter R: s\u2011method <\/td>\n<\/tr>\n
      55<\/td>\n25 Charts s-D to s-R \u2014 Acceptance curves for combined control of double specification limits: s-method <\/td>\n<\/tr>\n
      68<\/td>\nBibliography <\/td>\n<\/tr>\n
      70<\/td>\nAnnex A (normative) Table for determining the sample size code letter <\/td>\n<\/tr>\n
      71<\/td>\nAnnex B (normative) Form k for single sampling plans: s-method <\/td>\n<\/tr>\n
      74<\/td>\nAnnex C (normative) Form k for single sampling plans: \u03c3-method <\/td>\n<\/tr>\n
      77<\/td>\nAnnex D (normative) Values of f s for maximum sample standard deviation (MSSD) <\/td>\n<\/tr>\n
      80<\/td>\nAnnex E (normative) Values of f\u03c3 for maximum process standard deviation (MPSD) <\/td>\n<\/tr>\n
      81<\/td>\nAnnex F (normative) Estimating the process fraction nonconforming for sample size 3: s\u2011method <\/td>\n<\/tr>\n
      84<\/td>\nAnnex G (normative) Single sampling plans of Form p* <\/td>\n<\/tr>\n
      85<\/td>\nAnnex H (normative) Values of c U for upper control limit on the sample standard deviation <\/td>\n<\/tr>\n
      86<\/td>\nAnnex I (normative) Supplementary acceptability constants for qualifying towards reduced inspection <\/td>\n<\/tr>\n
      87<\/td>\nAnnex J (normative) Procedures for obtaining s and \u03c3 <\/td>\n<\/tr>\n
      89<\/td>\nAnnex K (informative) Consumer\u2019s risk qualities <\/td>\n<\/tr>\n
      93<\/td>\nAnnex L (informative) Producer\u2019s risks <\/td>\n<\/tr>\n
      97<\/td>\nAnnex M (informative) Operating characteristics for the \u03c3\u2011method <\/td>\n<\/tr>\n
      101<\/td>\nAnnex O (normative) Accommodating measurement variability <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

      Sampling procedures for inspection by variables – 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<\/b><\/p>\n\n\n\n\n
      Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
      BSI<\/b><\/a><\/td>\n2018<\/td>\n106<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":356918,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[97,2641],"product_tag":[],"class_list":{"0":"post-356910","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-03-120-30","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/356910","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/356918"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=356910"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=356910"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=356910"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}