7. Our advice
When it comes to characterizing external media (EM), be as evasive as possible; take a step back so as not to miss out on innovative solutions.
For example, in the case of the "designer desk lamp", one of the external environments concerns the user. He must switch the light point on and off. If you characterize the external environment as "the user", then all options are possible:
use the hand, one finger, two fingers ;
use voice, eyes, clap ;
use the foot, etc.
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Bibliography
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Regulatory references
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...
Website
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".
Acronyms and abbreviations
IPR: predictive risk index
AF: functional analysis
EME: external environment element
LED: light-emitting diode lamp
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