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Analyse et Cotation fonctionnelle

Secteur concerné :  Design & Construction

Durée de la formation : 6 jours

Lieu de la formation : WAN - Département Formations techniques (Gosselies)

Contact : 071/34 81 80 –

Field: Engineering – Methods – Processes – Quality

The training offered in this area will mainly concern staff working in one of the following sectors:

  • The design office;
  • Production ;
  • Methods and Processes Department ;
  • The Quality Department

The training projects concern the following points:

  • Project management,
  • Lean (Black, White and Green belt),
  • 6sigma,
  • FMECA,
  • Methods Officer,
  • Functional rating,
  • Knowledge Management,
  • Project management as a subcontractor,
  • Supply chain,
  • SPC,
  • Design to cost,
  • Assembly of aeronautical structures,
  • Knowledge of aeronautical materials,
  • Heat and surface treatments,
  • Evolution of aviation standards,
  • Machining methods and programming


Methods, design, production or industrialization office.



  • Mastery of functional analysis and rating
  • Mastery of the interpretation, representation and calculation of geometric tolerancing as part of the definition of your products.
  • Mastery of the ISO standard governing geometric tolerance rules and surface conditions
  • Homogenization of the knowledge of all technical stakeholders

Public cible et/ou pré-requis

Technicians and engineers required to make or read production or assembly plans.


Purpose and principle of functional dimensioning.

Functional study of a whole.

Identification of static links

Identification of dynamic links

Identification and materialization of all the operating conditions of an assembly

(For further definition of geometric specifications)

Inventory of functional areas and assignment of functional specifications (type ES, ED)

(For later definition of specific surface finishes)

Materialization of condition dimensions

(For a later definition of the tolerance of linear and angular dimensions)

Reminder on odds chains

The vector method

The table method

Definition transfers

Computerization of the calculation of chains of odds

Tolerance distribution methods. Methods – Intuitive

– Proportional


– Statistics

Application exercises

Principle of geometric tolerance

The role of geometric tolerance in functional dimensioning

The ISO 8015 standard

The envelope principle

The principle of independence

ANSI Standard Y14.5 ( 1982 rev 1988) 3

ASME Y14.5 ( 1994 ANSI Y 14.5 Rev)

Studies of the different reference systems and the associated isostatism

  • Simple references
  • Common references
  • Ordered references
  • Non-ordered references
  • Partial references
  • Tolerance zones

Representation and Interpretation of Geometric Orientation and Position Specifications

  • Parallelism
  • Perpendicularity
  • Inclination
  • Location
  • Coaxiality
  • Concentricity
  • Symmetry
  • The simple beat
  • The total beat

Calculation of geometric specifications

  • Calculation of perpendicularity
  • Location calculation
  • Coaxiality calculation
  • Calculation of definition transfer
  • Calculation with integration of the maximum material principle

Representation and Interpretation of geometrical specifications of shape defects

  • Straightness
  • Flatness
  • Circularity
  • Cylindricity
  • The shape defect of any line
  • The shape defect of any surface

Complementary geometric definitions

  • The projected tolerances P
  • The principle of the maximum material M
  • The principle of the minimum material L
  • The tolerance of thin deformable parts F
  • The Specific Tolerancing S
  • The tolerance of the tangent elements T

Representation and Interpretation of surface states

Basic concept

  • Surface condition specifications R and Ra ( Average)
  • Specifications extreme surface conditions Rt and Rmax ( Extreme)
  • W ripples
  • AW and AR roughness and ripple steps
  • TPn lift rates

Conditions d'admission

An experienced person in a methods office or production department.


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