Overview
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Delphine Mathilde COSME: Technical consultant, expert in materials assembly (plastics and metallurgy)
INTRODUCTION
The Functional Analysis (FA) of a product is the basis for drawing up the Functional Specifications (FSC), responding exactly to the user's needs. It can also be used as a basis for more comprehensive studies such as value analysis (VA), FMECA, etc.
In the previous steps, you have :
carried out preliminary investigative work;
Identify and order the functions (cf. sheet Product function types and function search method
) that reflect the user's needs;[FIC 0616] recognize the service functions (SF) and find the technical functions (TF), identify the constraints (cf. sheet Expressing constraints
);[FIC 0619] for each phase of the product's life cycle ( see the sheet Studying the product life cycle for functional analysis
), you have created a function tree ( see the sheet The function tree[FIC 0655] ).[FIC 0617]
Now you need to classify and characterize product functions.
Several methods can be used. Depending on the complexity of the system being studied and the field you're working in, adapt the way you approach the subject to the methods described.
The aim is to draw up the product's functional specifications (CdCF) and, if necessary, evaluate the...
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Functional analysis: classify and characterize functions - draw up functional specifications
Bibliography
Also in our database
Regulatory references
AFNOR NF X 50-100 November 2011: Value Management – Functional analysis, fundamental characteristics – Functional analysis: functional analysis of needs (external) and technical/product functional analysis (internal) – Requirements for deliverables and implementation procedures
AFNOR NF X 50-151 September 2007: Value Management – Functional expression of need...
Website
The " Sciences de l’Ingénieur " website provides comprehensive examples of functional analysis. In the "Resources" tab, type in the keyword "functional analysis".
Acronyms and abbreviations
CdCF: functional specifications
AF: functional analysis
AV: value analysis
FAST: Function Analysis System Technic
SADT: Structured Analysis and Design Technic
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