This standard is issued under the fixed designation B; the number 1 This test method is under the jurisdiction of ASTM Committee B08 on Metallic. ASTM B_机械/仪表_工程科技_专业资料。 Designation: B – 88 ( Reapproved ) Standard Test Method for Attribute Sampling. Purchase your copy of ASTM B – 88() as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards.
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In the extreme case of every article in an inspection lot being nonconforming, a sample will always indicate that the lot is unacceptable. Here, a constant interval is maintained between the items drawn for the sample. The AQL is the quality level that is considered to be acceptable.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Random sampling procedures are given in the Annex of this test method. Link to Active This link will always route to the current Active version of the standard. The plan of Table 4, which is used for destructive testing, is not from the Military Standard. Three are intended to be used when the inspection methods are nondestructive.
Also, Guide B describes the nature of attribute sampling plans and the several factors that must be considered in the selection of a sampling plan.
There is no AOQL for the plans used with destructive tests adtm destructive tests cannot be used to screen rejected lots. B — 88 5. Additional plans that may serve these aetm are given in Guide B Such lots will always be accepted. All other items are then drawn at a constant interval following the rst item. The poorest average quality level that can result from the use of a given sampling plan when screening of rejected lots is done is called the Average Outgoing Quality Limit AOQL.
ASTM B – 90() Standard Test Method of Variables Sampling of Metallic and Inorganic Coatings
Current edition approved May 15, Inspection and Lot Disposition 9. Additional plans that may serve these needs are given in Guide B This may be done by placing the units in racks or trays where the positions in the racks are numbered.
There may be instances in which tighter or looser plans or ones that are more discriminating are desired. When a test is neither clearly nondestructive nor destructive see Note 2, 8.
ASTM B602 – 88(2016)
Your basket is empty. Inspection lots that are unacceptable with respect to one or n602 requirements shall be rejected. A characteristic of the coating on the drawn articles is measured.
The acceptance number applies to each requirement in turn; it is not added. Throughout this method, it is assumed that no mistakes are made in sampling, measurement, and calculation. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
asgm A sampling plan is selected that will accept most submitted inspection lots of AQL quality and reject most lots of LQL quality. There may be instances in which tighter or looser plans or ones that are more discriminating are desired. Search all products by. A sampling plan is selected that has a high probability of accepting lots of AQL quality and of rejecting lots of LQL quality. Through the use of sampling plans, the risk of error is known and controlled. If the sample is consistently a signicant part of the lot, the correct AOQL will be smaller than the tabulated value.
Adtm the rst item is taken, the remaining items in the required sample are drawn by selecting every 24th item from the lot until are selected. Individual reprints single or multiple copies of this standard may be obtained by contacting Ashm at the above address or at phonefaxor service astm. If the pencil falls on column 10, line 11, and the coin is tails, the decision is to read down the column until 13 numbers are chosen.
This standard does not contain the Military Standard’s requirement for tightened b6602 when the quality history of a supplier is unsatisfactory.
There may be instances in which tighter or looser plans or ones that are more discriminating are desired. Instead, an attributes plan must be used. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Through the use of atm plans, the risk of error is known and controlled. The specific plans selected are identified in Tables of this test method. If it is less, the lot does not conform.