lFunctional model
»It is a
picture, a graphical representation
»The
overall function of a product is sub-divided into smaller, more elemental (i.e. atomic) sub-functions
»The
sub-functions are connected by the flows on which they operate
lSub-functions
»Simpler
expressions of part of the product’s overall function
»Expressed
in verb-object form
at a consistent level of detail