HCD.5:1 - Problem Frame

The same poor result can arise from different action failures. A person may lack a usable explanation, make a recurrent calculation error, fail to distinguish situations that call for different Methods, or combine individually correct steps badly in a whole task. The same visible failure may instead come from missing data, inaccessible sources, absent permission, an unsuitable tool, an unavailable specialist, or an unsafe workload.

Development Methods act differently. A worked example can expose reasoning that unsupported problem solving hides, but unchanged guidance can obstruct an experienced learner. Part practice can stabilize a recurrent operation, but it cannot teach when to use it. Whole tasks can expose coordination, but they can overload a novice when a true prerequisite is missing. Feedback can change the next attempt only when its information identifies an actionable difference.

Method selection connects a qualified target and starting attempt—or explicitly assumed entry conditions for a future audience—to a plausible change mechanism, while preserving the task, learner, support, evidence, burden, and risk conditions under which that mechanism might help.