exercises 15. task models

	EXERCISE 15.3 Figure 15.1 shows a textual representation of an HTA description of vacuum cleaning. Present the same information in a diagrammatic form answer This is given in Figure Ex15.3.1. In fact, this uses the revised version of 'plan 3', but the choice of plan makes no difference to the structure of the diagram. Figure Ex15.3.1 - HTA diagram for vacuum cleaning a house		Other exercises in this chapter ex.15.1 (ans), ex.15.2 (ans), ex.15.3 (ans), ex.15.4 (ans), ex.15.5 (ans), ex.15.6 (tut) all exercises for this chapter