Requirement- and Cost-driven Product Development Process

In the authors’ approach, the product development process is controlled by an ongoing target/actual (“Soll/Ist”) comparison between target properties and the state of properties currently achieved. For each property, depending on the fulfilment, quality ratings from the customer’s point of view are assigned. The aim of the product development process is the maximisation of the sum of these quality ratings. This aim can be realised based on the PDD approach, because it supports the engineer/designer by explicitly representing the interdependencies between the properties (that have to be optimized) and the characteristics that influence these properties.