C.29.3:4.2 - Construct input preparation

Explain how a required input is set in the system. Identify the physical or operational state that represents it: a stored value, an applied signal, an arranged material stock or another prepared condition.

Determine the admitted range and the relevant distinctions. A signed field has a finite range. A voltage input has units and a reference. A stock of three exclusive cards differs from two independent stocks of three. Recover initial state when the input is interpreted relative to it.

Apply the preparation to the required input. If it cannot be represented, choose among changing the encoding, changing the arrangement, restricting the input set or revising the computation. A large integer can sometimes be represented by several smaller values, but their execution must preserve the intended composition.

State rounding or other preparation loss in the same quantity that the receiving comparison uses. Retain a sufficient bound when it answers the question. Locate a lost distinction before deciding that a more precise number will restore it.