C.29.3:4.6 - Repair the connection and its dependents

Return to the part that changes the answer. Repair input preparation when a value cannot be represented. Repair the execution when permitted actions violate the intended operation. Repair readout when the available indication has been given the wrong meaning. Revise the physical or computational model when its retained state cannot express the relevant behavior.

Compare repairs by the result the work needs. Restricting a command range may be sufficient for one device. Splitting commands may preserve a larger range at the cost of extra execution time. Include the preparation, conversion, repeated execution and readout consumed by the proposed repair when comparing its cost with the available alternatives. A stronger sensor may be unnecessary when a conservative bound already settles the action.

Revisit contributions that consume the changed value, meaning or condition. Retain independent results whose assumptions still hold. B.5.MPC connects this local repair to the wider physical, mathematical and computational question.

When adapting the formulation and the apparatus together could improve the result, compare both directions. Ask which physical operations are available, how they can be interpreted computationally, and which change to the arrangement would make the useful operation easier or more reliable. C.29.2 develops the resulting formulation. Designing a new computational model or notation can require a substantial further method; name that task when the present construction reaches it.