Abstract
One-of-a-kind production is project business. In any project, the decision process is of importance for a successful outcome. However, there is a need for a more formal approach to decision-making in projects. We have therefore, developed a model of the decision process. It uses three types of decisions: selection, authorisation and plan decisions. Enterprise models together with the project life cycle form a platform for developing a decision model. The life cycle enables a decision chain, whereas the enterprise models allow decisions at different levels. The horizontal decision chain is linked to physical flow of documents and materials. Vertically, decision-making is hierarchically decomposed into levels of different planning horizons and time periods.
