1. Choose a graphic method
Using a graphic mode, visualize both the service functions (SF) and find the corresponding technical functions (TF); you need to understand the interactions between the product and its use in a specific environment.
1.1 Search by "function tree decomposition" (graphical method)
Organizing service (FS) and technical (FT) functions by levels (or ranks), in the form of a graph, requires functions to be prioritized and linked together.
This method is described in greater detail in the tree of functions sheet
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Choose a graphic method
Study of "dissatisfactions" with the existing product
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