1、raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI Standards Publication PD 68888:2011 PUBLISHED DOCUMENT Objectives and learning outcomes for BS 8888 training This publication is not to be regarded as a British Standard.PD 68888:2011 PUBLISHED DOC
2、UMENT Publishing and copyright information The BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2011 ISBN 978 0 580 72756 6 ICS 01.100; 01.100.01 The following BSI reference relates to the work on this standard: Committee reference TDW/4 Publication hi
3、story First published April 2011 Amendments issued since publication Date Text affected BSI 2011 i PD 68888:2011 PUBLISHED DOCUMENTContents Foreword ii 1 Scope 1 2 Normative references 1 3 Terms and denitions 1 4 Objectives and learning outcomes for BS 8888 training scheme 2 5 Level 1 training 2 6 L
4、evel 2 training 5 Annexes Annex A (informative) Recommendations for TPR content of initial engineering and product design qualications 7 Bibliography 12 Summary of pages This document comprises a front cover, an inside front cover, pages i to ii, pages 1 to 12, an inside back cover and a back cover.
5、ii BSI 2011 PD 68888:2011 PUBLISHED DOCUMENTForeword Publishing information This Published Document is published by BSI and came into effect on 30 April 2011. It was prepared by Subcommittee TDW/4/6, Technical product realization Education and training strategy, under the authority of Technical Comm
6、ittee TDW/4, Technical product realization. A list of organizations represented on this committee can be obtained on request to its secretary. BSI Subcommittee TDW/4/6 takes collective responsibility for its preparation. The Subcommittee wishes to acknowledge the contribution of the Institution of E
7、ngineering Designers. Relationship with other publications The need for this Published Document grew out of the publication of BS 8888 and the establishment of training courses to introduce its requirements to practising engineers, designers and technicians. Presentational conventions The provisions
8、 in this Published Document are presented in roman (i.e. upright) type. Its recommendations are expressed in sentences in which the principal auxiliary verb is “should”. Commentary, explanation and general informative material is presented in smaller italic type, and does not constitute a normative
9、element. Contractual and legal considerations This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a Published Document cannot confer immunity from legal obligations. BSI 2011 1 PD 68888:2011 PUBLI
10、SHED DOCUMENT1 Scope This document sets out the recommendations for training programmes in Technical Product Specication (TPS) based on the BS 8888. It provides guidance for the denition of content and learning outcomes of training courses and is aimed primarily at course developers. It is intended
11、for training courses targeted at practising engineers, designers and technicians. It does not provide training materials, assessment methods or certication mechanisms. NOTE 1 Examples of technical product specications include engineering drawings and 3D CAD models used for conveying engineering inte
12、nt. NOTE 2 A scheme based on this document is provided by the Institution of Engineering Designers.2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the lates
13、t edition of the referenced document (including any amendments) applies. BS 8888, Technical product specication BS EN 22768 (all parts), General tolerances3 Terms and denitions For the purposes of this Published Document, the following terms and denitions apply.3.1 core outcome necessary content of
14、courses at the level specied3.2 reader person who interprets the technical product specication NOTE The reader uses the drawings and associated documentation to support downstream applications such as manufacturing.3.3 specier person who produces the technical product specication NOTE The specier ge
15、nerates drawings and associated documentation, usually in design.3.4 supplementary outcome additional content of courses at the level specied, according to the training needs 3.5 verier person who conrms that the requirements given in the technical product specication have been satised2 BSI 2011 PD
16、68888:2011 PUBLISHED DOCUMENT4 Objectives and learning outcomes for BS 8888 training scheme Trainees should have some familiarity with technical product specications and engineering drawing practices and should be procient in the following: types of standards (BS, ISO and ASME); drawing sheet sizes;
17、 drawing sheet and title block requirements; orthographic projections; scales; line types; cross-section and detail views; representation of screw threads etc.; dimensions; dimension schemes and rules of dimensioning; linear tolerances; limits and ts. In addition, speciers should be able to: lay out
18、 a drawing sheet; select a suitable sheet size and scale; select and show suitable views; apply dimensions. NOTE Work roles are expected to fall into three categories: speciers, readers and veriers. The training in each of these categories is set out at two levels. Level 1: Basic, for those who are
19、taking on such roles and require to gain, or regain, familiarity with TPS documentation in a BS 8888 environment. Level 2: Advanced, for those already familiar with TPS documentation, who need to have a more advanced interpretation of details appropriate to their industry and role. The minimum level
20、 of expertise needed for Level 1 courses should be part of the initial education and training of designers (see Annex A). The course provider should certify the successful completion of the core, and any other supplementary, material.5 Level 1 training5.1 Objectives Upon completion of a Level 1 cour
21、se a specier should be able to produce technical product specications for manufactured components that conform to British and ISO standards and to use GPS specication methods. NOTE This can be achieved with supervision and guidance from a specier at Level 2 or equivalent. BSI 2011 3 PD 68888:2011 PU
22、BLISHED DOCUMENT Readers should be able to correctly interpret technical product specications produced to the standard of a Level 1 specier. Veriers should be able to verify technical product specications produced to the standard of a Level 1 specier.5.2 Core outcomes5.2.1 Core outcomes speciers Aft
23、er completing Level 1, a specier should be able to: understand the six degrees of freedom of a rigid body in three-dimensional space; select appropriate data and an appropriate datum hierarchy; correctly mark data on a 2D or 3D TPS; identify features-of-size; apply size tolerances; apply the Envelop
24、e Requirement where appropriate; select appropriate geometrical tolerances; correctly mark geometrical tolerances on a 2D or 3D TPS; apply the Maximum Material Requirement; calculate bonus tolerance; calculate the Virtual Condition size of a feature; be aware of the principles behind allocating tole
25、rance values; recognize surface texture symbols; recognize the following indications: L , P , F , CZ, “TOLERANCING ISO 8015, ASME Y14.5”.5.2.2 Core outcomes readers After completing Level 1, a reader should be able to interpret: datum indicators; a size tolerance; the Envelope Requirement; a limit a
26、nd t code; a position tolerance; a perpendicularity tolerance; a atness tolerance; the Maximum Material Requirement and calculate bonus tolerance.5.2.3 Core outcomes veriers After completing Level 1, a verier should be able to: understand the six degrees of freedom; understand the concept of uncerta
27、inty of measurement; interpret datum indicators; verify a size tolerance;4 BSI 2011 PD 68888:2011 PUBLISHED DOCUMENT verify the Envelope Requirement; verify a limit and t code; verify a geometrical tolerance; calculate bonus tolerance when Maximum Material Requirement is used; verify the Virtual Con
28、dition boundary of a feature. NOTE For the verier modules there is a clear connection with the metrology training provided by the National Physical Laboratory (NPL). It is envisaged that the verier modules could be developed with NPL, and become a product with joint ownership and delivery.5.3 Supple
29、mentary outcomes5.3.1 Supplementary outcomes speciers At Level 1, the supplementary outcomes for speciers should be to: have an awareness of BS EN 22768 (all parts) recognize a surface texture specication; recognize an edge tolerance specication; have an awareness of measurement methods.5.3.2 Supple
30、mentary outcomes readers At Level 1, the supplementary outcomes for readers should be to: recognize a surface texture specication; recognize other geometrical tolerance symbols.5.3.3 Supplementary outcomes veriers At Level 1, the supplementary outcomes for veriers should be to: recognize a surface t
31、exture specication recognize an edge tolerance.5.4 Assessment5.4.1 Assessment for speciers At Level 1, an assessment for speciers should include multiple choice and simple calculation questions, and written or verbal descriptions of key concepts. Speciers should also be able to identify 7 out of 10
32、errors on test drawings.5.4.2 Assessment for readers At Level 1, an assessment for readers should include a test paper with multiple choice questions. BSI 2011 5 PD 68888:2011 PUBLISHED DOCUMENT5.4.3 Assessment for veriers At Level 1, the assessment for veriers should be as dened in 5.4.1.6 Level 2
33、training COMMENTARY ON CLAUSE 6 Trainees at Level 2 are assumed to have met all the requirements of Level 1.6.1 Objectives Upon completion of a Level 2 course a specier should be able to produce technical product specications for manufactured components that conform to British and ISO standards and
34、to use GPS specication methods without supervision. Readers should be able to correctly interpret technical product specications produced to the standard of a Level 2 specier. Veriers should be able to verify technical product specications produced to the standard of a Level 2 specier.6.2 Core outco
35、mes6.2.1 Core outcomes speciers After completing Level 2, a specier should be able to: understand the difference between a datum, a datum feature and a simulated datum feature; understand the difference between an ideal feature, a real feature, an extracted feature and an associated feature; use a s
36、econd datum reference to orientate an orientation tolerance zone; apply the Maximum and Least Material Requirement; apply M to a datum reference in a geometrical tolerance; calculate a datum shift allowance; explain principles behind allocating tolerance values; identify whether the specication for
37、an elementary assembly will permit a clash; dene a projected tolerance zone; relate uncertainty of measurement to the allocation of tolerances.6.2.2 Core outcomes readers After completing Level 2, a reader should be able to: correctly interpret all geometrical tolerances; correctly interpret the Max
38、imum Material Requirement; calculate bonus tolerance; understand material condition applied to datums and datum shift; derive manufacturing methods from a TPS.6 BSI 2011 PD 68888:2011 PUBLISHED DOCUMENT6.2.3 Core outcomes veriers After completing Level 2 a verier should be able to: understand the di
39、fference between a datum, a datum feature and a simulated datum feature; understand the difference between an ideal feature, a real feature, an extracted feature and an associated features; verify an orientation tolerance zone with two datums; calculate bonus tolerance when Least Material Requiremen
40、t is used; verify a geometrical tolerance when M or L is applied to a datum reference. NOTE For the verier modules there is a clear connection with the metrology training provided by the National Physical Laboratory (NPL). It is envisaged that the verier modules could be developed with NPL, and beco
41、me a product with joint ownership and delivery.6.3 Supplementary outcomes6.3.1 Supplementary outcomes speciers At Level 2, the supplementary outcomes for speciers should be to: be able to specify an Ra value for a machined surface with a specied lay pattern requirement; be able to specify an edge to
42、lerance; be able to have a deeper awareness of measurement methods; have an understanding of BS EN 22768 (all parts).6.3.2 Supplementary outcomes readers At Level 2, the supplementary outcomes for readers should be to: be able to recognize a surface texture requirement; be able to recognize an edge
43、tolerance.6.3.3 Supplementary outcomes veriers At Level 2, the supplementary outcomes for veriers should be to: be able to verify a surface texture specication which includes an Ra value for a machined surface with a specied lay pattern requirement; be able to verify an edge tolerance; be able to de
44、rive verication methods from a TPS; be able to understand the following indications: “GENERAL TOLERANCES ISO 2768-mK” (where mK could be any of the permissible code indications).6.4 Assessment The assessment methods at Level 2 should be as set out in 5.4. BSI 2011 7 PD 68888:2011 PUBLISHED DOCUMENTA
45、nnex A (normative) Recommendations for TPR content of initial engineering and product design qualicationsA.1 Introduction There have been two major changes in recent years, which have affected the perception of Engineering Drawing as part of the initial academic qualications of professional engineer
46、s, CEng, IEng & Eng Tech, and of Product Designers. The rst is the gradual growth in the use of CAD systems, initially as 2D drawing aids and, more recently, as solid modelling systems able to link with a range of manufacturing and analysis options. As a result, the use of drawing boards has virtual
47、ly disappeared in both industry and academia, although the traditional orthographic drawing remains the major means of communicating design information to the manufacturer. Students are less familiar with the details of such communications, being less able to produce or read such drawings. The secon
48、d change has been the introduction of the Geometric Product Specication (GPS) system, internationally. This is specied in the UK by BS 8888. It has now been joined by the closely related BS 8887 (all parts) and BS 8889. These three are together referred to as covering Technical Product Realization (TPR). There is currently no specic guidance available from either the Engineering Council or the appropriate engineering and product design professional bodies on the requirements for accredited course content in this area. Since there is no mandate to set any standards in e
