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Sampling procedures for inspection by attributes- Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection (ISO 2859-1:1999, IDT)

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    • Sampling procedures for inspection by attributes- Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection (ISO 2859-1:1999, IDT)
      计数抽样检验程序 第1部分:按接收质量限(AQL)检索的逐批检验抽样计划

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    Details
    GB/T 2828 consists of the following parts, under the general title Sampling procedures for inspection by attributes:
    ———Part 1:  Sampling  schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection  (ISO  2859-1:1999, IDT)
    ———Part 2: Sampling plans indexed by limiting quality (LQ) for isolated lot inspection (ISO 2859-2:1985, NEQ)
    ———Part 3: Skip-lot sampling procedures (ISO 2859-3:2005, IDT) 
    ———Part 4: Procedures for assessment of declared quality levels (ISO 2859-4:2002, MOD)
    ———Part  5:  System  of  sequential  sampling  plans  indexed  by  acceptance  quality  limit  (AQL)  for  lot-by-lot 
    inspection (ISO 2859-5:2005, IDT)
    ———Part  10:  Introduction  to  the  GB/T  2828  series  of  standards  for  sampling  for  inspection  by  attributes  (ISO 
    2859-10:2006, MOD)
    ———Part 11: Procedures for assessment of declared quality levels for small population
    This is Part 1 of GB/T 2828.
    Contents
    This part of  GB/T 2828  specifies an acceptance sampling system for inspection by attributes. It is indexed in 
    terms of the acceptance quality limit (AQL).
    Its  purpose  is  to  induce  a  supplier  through  the  economic  and  psychological  pressure  of  lot  non-acceptance  to 
    maintain  a  process  average  at  least  as  good  as  the  specified  acceptance  quality  limit,  while  at  the  same  time 
    providing  an  upper  limit  for  the  risk  to  the  consumer  of  accepting  the  occasional  poor  lot.  Sampling  schemes 
    designated in this part of GB/T 2828 are applicable, but not limited, to inspection of 
    ———end items,
    ———components and raw materials,
    ———operations,
    ———materials in process,
    ———supplies in storage,
    ———maintenance operations,
    ———data or records, and
    ———administrative procedures.
    The sampling schemes in this part of GB/T 2828 are intended primarily to be used for a continuing series of lots, 
    that is, a series long enough to allow the switching rules (see 9.3) to be applied. These rules provide:
    a)  a  protection  to  the  consumer  (by  means  of  a  switch  to  tightened  inspection  or  discontinuation  of  sampling 
    inspection) should a deterioration in quality be detected;
    b) an incentive (at the discretion of the responsible authority) to reduce inspection costs (by means of a switch to 
    reduced inspection) should consistently good quality be achieved.
    Sampling plans in this part of GB/T 2828 may also be used for the inspection of lots in isolation but, in this case, the 
    user is strongly advised to consult the operating characteristic curves (see 12.6) for sampling plans to find a plan that 
    will  yield  the  desired  protection.  In  that  case,  the  user  is  also  referred  to  the  sampling  plans  indexed  by  limiting 
    quality (LQ) given in GB/T 2828.2-2008.
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