C.29.3:1 - Problem frame

Use this when a computation is available, but the proposed executing arrangement has not yet been connected to its inputs, operations and interpretable results. A motor interface may accept a different number from the one calculated. A circuit may produce a voltage whose scale differs from the input scale. A material admission procedure may preserve a count only while several people share the same stock of cards.

Start with one input the work needs. Explain how it is prepared in the proposed system, which actions perform the computation and how the result is read. Compare the interpreted result with what the abstract computation requires. A failed input preparation, such as a command outside the interface’s range, can already determine a useful repair.

The first result is a realization design under stated conditions, an interpreted result from an execution, or a particular failed connection with a proposed correction. The method helps construct and use that connection. The engineering of a circuit, controller, physical apparatus or administrative arrangement supplies the mechanisms that perform the computation.

The reader should understand the intended computation and be able to obtain explanations of the system’s relevant operations. The examples supply their arithmetic, elementary electrical account and card rules. More demanding uses need the corresponding knowledge of hardware, numerical methods, physical models or concurrent operation.

Use an adequate existing implementation directly when its inputs, behavior and result interpretation already meet the receiving need. Use C.29.2 when the computational procedure itself must be constructed. Use B.5.MPC when the open question also concerns which physical account and mathematical question can answer the original problem.