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MTL-STD-1916零缺陷抽样计划英文版
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MTL-STD-1916抽样标准英文版本,有需要的朋友参考,中文版本比这个稍有不全
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AMSC N/A AREA QCIC
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
DEPARTMENT OF DEFENSE
TEST METHOD STANDARD
DOD PREFERRED METHODS
FOR ACCEPTANCE OF PRODUCT
NOT MEASUREMENT
SENSITIVE
MIL-STD-1916
1 April 1996
MIL-STD-1916
ii
F O R E W O R D
1. This Military Standard is approved for use by all Departments and Agencies of the
Department of Defense (DoD).
2. Beneficial comments (recommendations, additions, deletions) and any pertinent data
which may be of use in improving this document should be addressed to: Commander, U.S.
Army Armament Research, Development and Engineering Center, ATTN: AMSTA-AR-EDE-S,
Picatinny Arsenal, NJ 07806-5000, by using the self-addressed Standardization Document
Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.
3. DoD procurement practices encourage industry innovation and provide flexibility to
achieve the benefits of continuous improvement.
4. There is an evolving industrial product quality philosophy that recognizes the need for
quality policy changes that will provide defense contractors with opportunities and incentives
toward improvement of product quality and cooperative relationships between the contractor and
the Government.
5. Process controls and statistical control methods are the preferable means of preventing
nonconformances, controlling quality, and generating information for improvement. An
effective process control system may also be used to provide information to assess the quality of
deliverables submitted for acceptance. Suppliers are encouraged to use process control and
statistical control procedures for their internal control and to submit effective process control
procedures in lieu of prescribed sampling requirements to the Government for approval.
6. Sampling inspection by itself is an inefficient industrial practice for demonstrating
conformance to the requirements of a contract and its technical data package. The application of
sampling plans for acceptance involves both consumer and producer risks; and increased
sampling is one way of reducing these risks, but it also increases costs. Suppliers can reduce
risks by employing efficient processes with appropriate process controls. To the extent that such
practices are employed and are effective, risk is controlled and, consequently, inspection and
testing can be reduced.
7. The following points provide the basis for this standard:
a. Contractors are required to submit deliverables that conform to requirements and to
generate and maintain sufficient evidence of conformance.
b. Contractors are responsible for establishing their own manufacturing and process
controls to produce results in accordance with requirements.
c. Contractors are expected to use recognized prevention practices such as process
controls and statistical techniques.
8. This standard also provides a set of sampling plans and procedures for planning and
conducting inspections to assess quality and conformance to contract requirements. This
standard complies with the DoD policy of eliminating acceptable quality levels (AQL's) and
associated practices within specifications.
MIL-STD-1916
C O N T E N T S
PARAGRAPH PAGE
iii
1. SCOPE ................................................................................................................. 1
1.1 Scope.................................................................................................................. 1
1.2 Applicability ....................................................................................................... 1
1.3 Applications........................................................................................................ 1
1.4 Product requirements.......................................................................................... 1
1.5 Limitations.......................................................................................................... 2
2. APPLICABLE DOCUMENTS.............................................................................. 3
2.1 General............................................................................................................... 3
2.2 Non-Government publications............................................................................. 3
2.3 Order of precedence............................................................................................ 4
3. DEFINITIONS...................................................................................................... 5
3.1 Acronyms used in this standard........................................................................... 5
3.2 Acceptance......................................................................................................... 5
3.3 Contract quality requirements.............................................................................. 5
3.4 Critical characteristic........................................................................................... 5
3.5 Critical nonconforming unit................................................................................. 5
3.6 Government contract quality assurance................................................................ 6
3.7 Inspection........................................................................................................... 6
3.8 Major characteristic............................................................................................. 6
3.9 Major nonconforming unit................................................................................... 6
3.10 Minor characteristic............................................................................................ 6
3.11 Minor nonconforming unit................................................................................... 6
3.12 Nonconformance................................................................................................. 6
3.13 Nonconforming unit............................................................................................ 6
3.14 Production interval.............................................................................................. 6
3.15 Quality................................................................................................................ 6
3.16 Quality assurance................................................................................................ 6
3.17 Quality audit....................................................................................................... 6
3.18 Quality program.................................................................................................. 6
3.19 Screening inspection............................................................................................ 7
3.20 Traceability......................................................................................................... 7
3.21 Verification level (VL)........................................................................................ 7
4. GENERAL REQUIREMENTS............................................................................. 8
4.1 Acceptance by contractor-proposed provisions.................................................... 8
4.1.1 General............................................................................................................... 8
4.1.2 Requirements and procedures.............................................................................. 8
MIL-STD-1916
C O N T E N T S
PARAGRAPH PAGE
iv
4.1.3 Submission and incorporation.............................................................................. 9
4.1.3.1 Submission.......................................................................................................... 9
4.1.3.2 Incorporation...................................................................................................... 9
4.1.4 Withdrawal of approval of alternates................................................................... 9
4.2 Acceptance by tables........................................................................................... 9
4.2.1 Preferred sampling plans...................................................................................... 9
4.2.2 Formation and identification of lots or batches..................................................... 9
4.2.3 Determination of sampling plan........................................................................... 10
4.2.4 Sampling of lots or batches.................................................................................. 10
4.2.4.1 Selection of units................................................................................................. 10
4.2.4.2 Representative (stratified) sampling..................................................................... 10
4.2.4.3 Process of sampling............................................................................................. 10
4.2.4.4 Non-conforming product..................................................................................... 10
4.3 Disposition of nonconforming product................................................................ 11
4.4 Critical characteristics......................................................................................... 11
4.5 Special reservations for critical nonconformance.................................................. 11
5. DETAILED REQUIREMENTS............................................................................ 12
5.1 Acceptance by contractor proposed-provisions ................................................... 12
5.1.1 Quality system plan............................................................................................. 12
5.1.2 Prevention-based quality system.......................................................................... 12
5.1.3 Process focus of quality system........................................................................... 12
5.1.4 Objective evidence of quality system implementation and effectiveness................ 13
5.1.4.1 Examples of evidence regarding process improvement......................................... 13
5.1.4.2 Examples of evidence regarding process control.................................................. 13
5.1.4.3 Examples of evidence regarding product conformance......................................... 14
5.2 Acceptance by tables........................................................................................... 14
5.2.1 Sampling inspection............................................................................................ 14
5.2.1.1 Verification level specification............................................................................. 14
5.2.1.2 Sampling procedures........................................................................................... 15
5.2.1.3 Switching procedures.......................................................................................... 15
5.2.1.3.1 Normal to tightened............................................................................................ 15
5.2.1.3.2 Tightened to normal............................................................................................ 16
5.2.1.3.3 Normal to reduced.............................................................................................. 16
5.2.1.3.4 Reduced to normal.............................................................................................. 16
5.2.1.4 Discontinuation of acceptance............................................................................. 16
5.2.2 Preferred sampling inspection tables.................................................................... 17
5.2.2.1 Attributes sampling plans for lot or batch inspection............................................ 17
5.2.2.1.1 Acceptability criterion......................................................................................... 17
MIL-STD-1916
C O N T E N T S
PARAGRAPH PAGE
v
5.2.2.2 Variables sampling plans for lot or batch inspection............................................. 17
5.2.2.2.1 Limitations on use............................................................................................... 17
5.2.2.2.2 Nonconforming unit............................................................................................ 18
5.2.2.2.3 Acceptability criteria........................................................................................... 18
5.2.2.3 Continuous attributes sampling inspection plans.................................................. 20
5.2.2.3.1 Conditions for continuous sampling procedures................................................... 20
5.2.2.3.2 Continuous sampling inspection procedure.......................................................... 21
5.2.2.3.3 Acceptability criterion......................................................................................... 21
5.2.2.3.3.1 Special reservation for critical nonconforming unit.............................................. 21
6. NOTES.................................................................................................................. 22
6.1 Intended use........................................................................................................ 22
6.2 Issue of DoDISS................................................................................................. 22
6.3 Supersession data................................................................................................ 22
6.4 Subject term (keyword listing)............................................................................. 22
TABLE
I Code letters (CL) for entry into the sampling tables............................................. 15
II Attributes sampling plans.................................................................................... 17
III Variables sampling plans..................................................................................... 19
IV Continuous sampling plans.................................................................................. 20
APPENDIX Examples of sampling plan use............................................................................ 23
FIGURE
1 Attributes sampling inspection log....................................................................... 24
2 Computations for single specification limit case................................................... 25
3 Computations for double specification limit case.................................................. 26
4 Continuous sampling inspection log..................................................................... 27
5 Procedure to determine a valid f.......................................................................... 28
CONCLUDING MATERIAL................................................................................ 29
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