HCD.Preface:1 - Start from the contribution that later Work needs

Use HCD when a person, manager or development practitioner needs to improve or sustain a human contribution to later Work, and must decide what development is worth attempting under real time, access and support conditions. The question may arise before a programme, during a difficult practice attempt, after a successful assessment, or years later when the Work changes. A learning-product author can also use the framework while the future audience is still an assumption.

The recurring difficulty is connecting a development activity to the contribution it should change. A curriculum may cover every topic while leaving whole tasks out of reach. A good assisted answer may conceal the action the person still cannot supply. A once useful arrangement may become unsuitable after a tool, task or provider changes. HCD makes these differences actionable: identify the required contribution, compare a plausible development change, obtain the support it needs, and judge only what the subsequent observation can establish.

Begin with the decision now in front of you. State whose contribution matters, in what later Work, what is already known, and which result would change the next action. Then enter the relevant body through the Practical entries. The first useful result can be small: a demand hypothesis, two comparable task fragments, a corrected practice attempt, one qualified performance claim, or an exact missing contribution to obtain. A known person needs compatible personal evidence; an author without named learners can proceed directly to HCD.28, which constructs the product before personal comparison through HCD.2.

The main choices concern complete-task attainability, preservation of useful existing contributions, and the effort displaced by development. More practice, realism, independence, assessment or provider preparation can improve one condition while making the whole arrangement too burdensome or changing the task being judged. Select these contributions for the live question and compare their combined demands. The programme and instrument application makes that whole-arrangement constraint concrete.