Samenvatting
The supply of transport meets a certain minimum level of requirements set up by the demand for transport. This fact is to be taken into account when measures of transport effectiveness are to be evaluated by utility-analysis. The common decision-rules do not fit. Therefore the evaluator has either to select a set of relevant alternatives, or to give a decision-rule set up for the problem, or to solve the utility analysis problem, or to solve the utility-analysis-problem by linear-programming observing adequate constraints.