2. List complementary functions = level 1 and level 2
Transform all the desires expressed by the user into an action or benefit (service rendered by the product). Use a verb and a complement.
List the actions to be performed by the product or system one by one.
The basic principle is as follows:
the object studied has functions only in use;
the functions of an object are independent of the solutions that realize them;
an object's functions are independent of each other.
Example 1: "Redesign" of the "refillable flint gas lighter" - service functions
The service functions in use are :
ignite a gaseous mixture;
use one hand ;
...
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List complementary functions = level 1 and level 2
Choosing between internal functional analysis (IFA) and external functional analysis (EFA)
Bibliography
Also in our database
Regulations
AFNOR NF X 50-100 November 2011: Value Management – Functional analysis, fundamental characteristics – Functional analysis: functional analysis of the need (or external) and technical/product functional analysis (or internal) – Requirements for deliverables and implementation procedures
AFNOR NF X 50-151 September 2007: Value Management – Functional expression of need...
Websites
The " Sciences de l’Ingénieur " website provides comprehensive examples of functional analysis. This link will take you directly to the list of available examples. In the "Resources" tab, type in the keyword "Functional analysis".
INPI (the Soleau envelope in practice) is available...
Acronyms and abbreviations
AF: functional analysis
AFE: external functional analysis
AFI: internal functional analysis
FAST: Function Analysis System Technic
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