Designing Complex Systems

Functional Elements and the Functional Domain n 71

for the functional parameters of these elements under the constraint of the value

functions.

Each parameter can take on values in a range of values that may be discrete,

continuous, or a combination of both. e smallest range is that consisting of two

discrete values (e.g., 0 and 1, or true and false), the largest is the real line.

However, the functional parameters of an element are not all independent; the

functions between the variables of an element, and which form part of the defini-

tion of the element, place restrictions on the sets of values that can be delivered by

the element, and this is what the users see as part of the behavior or performance of

the element. In particular, as wa ...