WORKING GROUPS OF ISO/TC 213

| WG 2 | WG 4 | WG 6 | WG 9 | WG 10 | WG 12 | WG 14 | WG 15 | WG 16 | WG 17 | WG 18 |

Task:  

Revision of ISO 5459. The work shall cover chain link number 1, 2, 3 and 4 of the chain of standards on datums according to ISO/TR 14638:1995. The work shall result in :

• ISO 5459-1; Geometrical product specifications (GPS) - Datums for geometrical tolerancing - Part 1: General terms and definitions
• ISO 5459-2; Geometrical product specifications (GPS) - Datums for geometrical tolerancing - Part 2: Datums and datum systems. Drawing indication
• ISO 5459-3 Geometrical product specifications (GPS) - Datums for geometrical tolerancing - Part 3: Establishment of datums and datum systems for the assessment of geometrical tolerances

Needed coordination:

• ISO/TC 213/WG 14

The working group is to be disbanded when the task has been carried out.

Convener

Mr. Renald Vincent

Secretary

Mrs. Marquerite de Luze

ISO/TC 213/WG 4 - Uncertainty

Task:

Standardization of the estimation and indication of uncertainty of measurement in GPS-measurement of workpieces and measuring equipment characteristics and the standardization of how the uncertainty of GPS-measurement is taken into account when proving conformance and non conformance with specifications. The work shall result in:

• ISO 14407, Geometrical Product Specification (GPS) - Guide to the estimation of specification uncertainty
• ISO/TR 14253-2, Geometrical Product Specifications (GPS) - Inspection by measurement of workpieces and measuring instruments - Part 2: Guide to the estimation of uncertainty of measurement in calibration of measuring equipment and product verification (under publication)
• ISO 14253-3, Geometrical Product Specifications (GPS) - Inspection by measurement of workpieces and measuring equipment - Part 3: Guide to the evaluation of the integrity of measurement uncertainty statements
• ISO 14253-4, Geometrical Product Specifications (GPS) - Inspection by measurement of workpieces and measuring equipment - Part 4: Consequences of decision rules and the PUMA method

Needed coordination:

• ISO/TC 213/WG 14 

The working group is to be disbanded when the task has been carried out.

Convener

Dr. Henrik S. Nielsen

Secretary

Mr. Hans Henrik Køster

ISO/TC 213/WG 6 - General requirements for GPS-measuring equipment

Task:

ISO/TC 213/WG 6 in the following sequence to:

A) Prepare a global GPS guideline standard covering column 5 according to ISO/TR 14638:1995.

• describing the metrological characteristics of GPS-measuring equipment needed to assess the uncertainty of measurement of a particular measuring task,
• defining how to express MPEs according to the type of measuring equipment
• including specific GPS measuring equipment definitions,
• recommending design requirements to be covered.

The work shall result in:

• ISO 14978, Geometrical Product Specifications (GPS) General requirements for dimensional and geometrical measuring instruments

B) Review of comments and to finalize ISO/DIS 463, 1938, 9121, 9493, 13225, 13885 for FDIS-ballot.

The work shall result in:

• ISO 463, Geometrical Product Specifications (GPS) - Dimensional measuring instruments: Dial Gauges - Design and metrological requirements
• ISO 1938, Geometrical Product Specifications (GPS) - Inspection of plain workpieces by plain limit gauges (revision of ISO/R 1938:1971)
• ISO 9121, Geometrical Product Specifications (GPS) - Dimensional measuring instruments: Internal micrometers with two point contact - Design and metrological requirements
• ISO 9493, Geometrical Product Specifications (GPS) - Dimensional measuring instruments: Dial test indicators (lever type) - Design and metrological requirements
• ISO 13225, Geometrical Product Specifications (GPS) - Dimensional measuring instruments: Height gauges - Design and metrological requirements
• ISO 13385, Geometrical Product Specifications (GPS) - Dimensional measuring instruments: Callipers and depth gauges - Design and metrological requirements (Revision of ISO 3599:1976 and ISO 6909:1984)

NOTE Preparation of the standards on:

• ISO 15060, Geometrical Product Specifications (GPS) - Dimensional measuring instruments: Tape measure - Design and metrological requirements
• ISO 15518, Geometrical Product Specifications (GPS) - Functional gauges - Design and metrological requirements(covering both hard and soft functional gauging)

is postponed until further notice.

Needed coordination:

• ISO/TC 213/AG 11, ISO/TC 213/WG 4, ISO/TC 213/WG 10 and ISO/TC 213/WG 10

The working group is to be disbanded when the task has been carried out.

Convener

Dr. Howard Harary

Secretary

Mr. Mark Nasson

ISO/TC 213/WG 9 - Dimensional and geometrical tolerancing for castings

Task:

To revise ISO 8062 to constitute a complementary GPS-standards covering chain link 1 and 2 of the moulding/casting chain of standards according to ISO/TR 14638:1995.

The work shall result in:

• ISO 8062-1, Geometrical Product Specifications (GPS) - Dimensional and geometrical tolerances for moulded parts - Part 2: Terms, definitions and general principles of specifications (Partly revision of ISO 8062:1994)
• ISO 8062-2, Geometrical Product Specifications (GPS) - Dimensional and geometrical tolerances for moulded parts - Part 2: Dimensional and geometrical tolerances and machining allowances for castings (Partly revision of ISO 8062:1994)

taking into account the revision of ISO 10135. ISO/TC 213/WG 9 shall also act as a joint Working Group for the joint ISO/TC 213 + ISO/TC 10 revision of ISO 10135 according to previous agreement with ISO/TC 10.

Needed coordination:

• ISO/TC 10/SC 6 and ISO/TC 213/WG 14

The working group is to be disbanded when the task has been carried out.

Convener

Secretary

Mr. Burghart Brinkmann

ISO/TC 213/WG 10 - Coordinate measuring machines

Task:

ISO/TC 213/WG 10 to achieve the following in the given prioritized sequence:

Needed coordination:

• ISO/TC 213/AG 1, AG 11, WG 4, WG 6, WG 12, WG 14, WG 15, WG 16, WG 18

The working group is to be disbanded when the task has been carried out.

Convener

Dr. Craig Shakarji

Secretary

Mr. Hans Henrik Køster

Photo of ISO/TC 213/WG 10

ISO/TC 213/WG 12 - Size

Task:

Standardization of chain link 1, 2, 3, 4, 5 and 6 in the chain of standards on size based on the the resolutions nos. 41, 44 and 45 of ISO/TC 213/AG 7 N 44, and standardization of chain link 1 and 2 in the other dimension chains of standards.

The work shall result in:

• ISO 286-1, Geometrical Product Specifications (GPS) - ISO system of limits and fits - Part 1: Bases of tolerances, deviations and fits (Revision ISO 286-1:1988 incl. revision ISO 1829:1975)
• ISO 2768-1, Geometrical Product Specifications (GPS) - General tolerances - Part 1: Tolerances for linear and angular dimension without individual tolerance indications (Revision ISO 2768-1:1989)
• ISO 14405 (1st edt.), Geometrical Product Specifications (GPS) - Linear sizes; Supplementary drawing indications
• ISO 129-2 (1st edt.), Geometrical Product Specifications (GPS) - State-of-the-art of dimensional and associated tolerancing
• ISO/TR 16570, Geometrical Product Specifications (GPS) - Linear dimensioning and tolerancing: ±limit deviations - Step dimensions, dimensions, distances, angular sizes and radii (To be withdrawn when ISO 14405 and ISO 129-2 have been published)

Further work of WG 12 covers considerations on necessary changes to ISO 286-2.

Needed coordination:

• ISO/TC 10/SC 1, ISO/TC 213/WG 14 and ISO/TC 213/WG 18

The working group is to be disbanded when the task has been carried out.

Convener

Mr. Hans Lilja

Secretary

Mr. Sven Radhe

ISO/TC 213/WG 14 - Vertical GPS principles

Task:

Standardization on a global level of the underlying concepts for chain link 1 to 6 standards taking into account the underlying principles in the current standards and working groups in order to ensure a fully harmonized GPS system by:

• preparing a detailed long term strategic plan encompassing the concepts outlined in doc. ISO/TC 213/AG 6 N 7 rev. and the operator principle doc. ISO/TC 213/WG 6 N 18 rev.;
• providing a vertical coordination and harmonization between current ISO/TC 213 efforts in all chain of standards;
• simplifying the entire GPS system, by applying rigorous, systematic global approach, elaborated on the basis of the Technical Report resulting from doc. ISO/TC 213/AG 6 N7.

The work shall include the:

• concept presented in ISO/TC 213/WG 1 N 66;
• continuation of the work on vectorial dimensioning and tolerancing as per the former ISO/TC 213/AG 3;
• continuation of the work on assembly level tolerancing as per the former ISO/TC 213/AG 10.

and shall preliminarily result in:

• ISO/TS 17450-1, Geometrical Product Specifications (GPS) - General concepts - Part 1: Model for geometrical specification and verification
• ISO/TS 17450-2, Geometrical Product Specifications (GPS) - General concepts - Part 2: Operators and uncertainties

Needed coordination: All Working groups of ISO/TC 213

Convener

Mr. Renald Vincent

Secretary

Mrs. Marquerite de Luze

ISO/TC 213/WG 15 - GPS extraction and filtration techniques

Task:

1 Filtration and extraction 

To continue the study of new techniques to extract surface and profile information with the purpose of determining its 

• fields of applications 
• improvements over current filtering techniques 
• improvements over current sampling techniques 
• suitability for standardization. 

The study shall include the following non-exhaustive list: 

• splines 
• wavelets 
• robust filtering 
• morphological filters 
• sampling 
• outlier identification and removal 
• Investigation of the issue of the profile distortion effect of the probe tip radius 

The study shall result in the preparation of documents according to the Filtration and Extraction Masterplan's contained in doc. ISO/TC 213/AG9 N 101. 

2 Procedures and methodology 

To initiate work on an additional standard dealing with: 

• "specification for the economically viable application of sampling and filtration methodology", and; 
• “dynamic transmission characteristics of a measurement procedure”. 

3 Revisions

To revise: 

• ISO 11562:1996 
• ISO 12085:1996 
• ISO 13565-1:1996 

4 Tasks in support of other work within ISO/TC 213 

To assist: 

• ISO/TC 213/WG 16 in defining areal filters for form. 
• ISO/TC 213/WG 2 in defining the type of filters for datums 
• ISO/TC 213 in considering the problem of filtering out roughness for the function of assembly such that the resulting surface retain location of all roughness peaks and do not penetrate into roughness valleys. 

Needed coordination: 

• ISO/TC 213/AG 11, ISO/TC 213/WG 14,  ISO/TC 213/WG 16

The working group is to be disbanded when the task has been carried out. 

Convener

Dr. Paul J. Scott

Secretary

Ms. Sarah Kelly

Presentation

Site of ISO/TC 213/WG 15

ISO/TC 213/WG 16 - Areal and profile surface texture

Task:

To develop standards for areal surface texture and prepare revision of standards on profile surface texture as follows:

1 Standards covering chain link 1, Drawing writing rules

• Prepare for a revision/addendum of ISO 1302:2002 specifying rules for indication of areal surface texture in technical product documentation. 
• Monitor and make recommendations in respect of a new GPS-unified indication system using frames and non default indications consistent with those now considered for Form and Position, ensuring close liaison with relevant working groups. 
• Important and urgent items: 

• Rules for identification of profile and areal filters with their nesting indexes. 
• A new annex on Evaluation and Sampling Area 
• A new annex on the use and interpretation of lay symbols, both for profile and areal surface texture
• More examples in annex C covering all the possibilities to specify parameters related to bearing area and areal parameters. 

Project leader: --

2 Standards covering chain link 2, Terms, definitions and parameters 

• Consider integrating Standard " Surface texture: Areal -part 1 " and Parameters in Standard " Surface texture- Sheet materials for automotive applications " into one new Standard
• Consider converting the rest of sheet metal materials standard into a pure chain link 3 standard giving precise specification operators for this purpose, including missing information on choice of filter and specifying short-hand indications. 
• Consider the concept of primary surface/ primary profile with the aim of presenting a GPS-unified definition system that in its general form is non-specific, but can be made specific for measurements within differently sized nesting indexes and propose the necessary changes in all affected GPS-standards. 
• Revision of ISO 4287:1997. 

Project Leader: Dr. Paul J. Scott

3 Standards covering chain link 3, Specification operators 

• Study the area concept of “Definition area/Evaluation window” vs. the profile concept of " Sampling length/Evaluation length " with the aim of providing a GPS-unified nomenclature. 
• Consider treating the concept of " Extracted " equally in the area and profile standards and propose needed changes in the profile standards. 
• Consider the advantages and disadvantages of having a preferred number series for the extraction window, default vs. functional choice. 
• Study the possibilities to unify the measuring conditions of area measurement vs. profile measurement and propose any needed changes in the profile standards in order to harmonise the demands on measuring equipment, specially regarding S-filters and stylus ball radii. 
• Define the association method according to the results of the definition of primary surface/primary profile. 
• Propose the contents of an expected new profile standard on specification operators partially replacing the present ISO 3274:1996. - Prepare a possible new standard for sheet metal surfaces. 

Project Leader: Dr. Paul J. Scott

4 Standards covering chain link 4, Comparison rules 

• Parameter estimation section to be harmonised with part 1 and 2. 
• Development of an informative annex providing guidance on how to evaluate measurement uncertainty contributors, originating from the actual verification operator used on an actual surface. 
• Determine the need for giving more information on the concept of functional filtering. 

Project Leader: Mr. John Westberg

5 Standards covering proposed new chain link 5, Verification operators 

• Programme to be developed. 

Project Leader: to be appointed 

6 Standards covering chain link 6, Measurement equipment requirements 

• Areal standard part 5 to be compared with profile standard ISO 3274 and changes in the latter identified in order to ensure harmonization.
• Work preparing for a draft standard proposal on non-contact (optical) instruments to be started. (Involving e.g. interferometric microscope, instruments using structured light, scattered light instruments and Nomarski profilers) 
• Classification of instruments 
• Reference software for calibration to be developed. 

Project Leaders: Dr. Ted Vorburger for optical instruments Mr. Jean Francois Ville for stylus instruments 

7 Standards covering chain link 7, Calibration 

• Areal standard part 6 for contact instruments is essentially ready to be finalised. 
• Work preparing for a draft standard proposal on non-contact instruments to be started 
• Development of software gauges (file formats). 

Project Leaders: Dr. Ted Vorburger for optical instruments Mr. Jean Francois Ville for stylus instruments 

Needed coordination: 

• ISO/TC 213/AG 11, ISO/TC 213/WG 14,  ISO/TC 213/WG 15

The working group is to be disbanded when the task has been carried out.

Convener

Mr. John Westberg

Secretary

Mr. Sven Radhe

ISO/TC 213/WG 17 - Facilitation of GPS implementation

Task:

To prepare recommendations for: 

• promotion of the universal use of all GPS Standards, as indicated in ISO/TR 14638 GPS Masterplan, taking into consideration, relevant ISO standards, prepared by other TCs 
• preparation of a “model standard” providing indexing and acting as a “roadmap” to GPS, taking into account the GPS and other relevant ISO Standards, appropriate for use as the common basis for National implementation of the GPS system, envisaged by ISO/TC 213. 
• the structure for a revision of the ISO Handbook on “Limits and Fits” so as to facilitate its conversion to a GPS Handbook 

Needed coordination: ISO/TC 213/AG 1 (in particular) as well as all other Advisory Groups and Working Groups of ISO/TC 213. 

Convener

Mr. Iain MacLeod

Secretary

Ms. Sarah Kelly

ISO/TC 213/WG 18 - Geometrical tolerancing

Task:

Standardization for chain links 1 to 3 and 5 (based on the 7 column matrix) including:

• Development of a toolbox of GPS language building blocks to allow the expression of a wide range of functional requirements. The specific functions may or may not be identified. The toolbox shall be based on the systematic operator concepts developed in WG14.
• Development of necessary additions to the drawing indication language to invoke these specification operators and any necessary parameter values, such as filter types, nesting indices, association criterion etc. both for datum features and toleranced features.
• Investigate the need for tools to express the loss function associated with a tolerance, i.e. how does function decline as tolerances are exceeded.

The work shall include:

• Creating an overview of the existing system, identifying areas where there are exceptions to the logic of the rule-based system.
• Ensuring that the transitions between various attributes are not abrupt, including, but not limited to the transitions between form, waviness and roughness, between form and tolerances constrained by datums and datum systems and between geometrical and dimensional tolerances.
• Identifying gaps in the existing system, i.e. geometrical requirements that cannot be expressed with current drawing indications (For examples, see next paragraph).
• Ensuring that an unambiguous translation back and forth between 2D and 3D drawing indications is possible.
• Ensuring that an unambiguous translation back and forth between 2D drawings and tolerancing based on CAD files with queryable dimensions and geometrical tolerances based on these dimensions is possible.
• Development of proper definitions of TED-patterns and associated rules.
• Development of definitions for variable tolerance zones, including variations in the width, direction and off-set of the tolerance zone.
• Considering the question on the definition of Feature of Size as raised in WG 14 Resolution 137.

Currently identified gaps and exceptions are:

• Lack of ability to specify that a straightness requirement applies in all directions, similar to surface texture requirements.
• Lack of ability to specify modifiers and filters for datums to simulate function where the datum is not assembled into a fixed position in the product.
• Lack of ability to specify modifiers and filters for other than form tolerances.
• Lack of ability to specify a tolerance as a mathematical function, rather than a fixed value. For example, an angle tolerance could be expressed as a linear function.
• Lack of ability to specify other than rectangular or circular tolerance zones, e.g. elliptical tolerance zones.
• The vectorial sum of roundness and concentricity does not equal (vectorial) runout.

The work shall preliminarily result in:

• Amendments to ISO 1101, ISO 5459 and associated and other standards, as necessary.
• Development of new standards where the identified needs do not fit into current standards.

Needed coordination: ISO/TC10 and all working groups of ISO/TC 213.

Convener

Mr. Johan Dovmark

Secretary

Mr. Hans Henrik Køster