8. Mistakes to avoid
Don't mix up solutions and functions (waterproofing/protecting against water): always stay at the conceptual level.
Don't forget any functions: all the above methods can be used to list all functions. Use the method that suits you best and check with another method if your list is complete.
Don't over-engineer (too many functions): keep to the user's strict requirements, as each additional function represents an increase in design cost and selling price. Stay at the concept level (no details) in the first instance.
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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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