We have found two main causes of inadequacies in a decision support system designed by us. They are, in general, the lack of direct user participation and the lack of designer accountability in the design process. In an attempt to solve the problem, we develop a new design method, the User Participation and Designer Accountability (UPDA) method. It involves users' direct manipulation of colour ... [Show full abstract] cards, which contain the contents of simple design charts. These cards are also made accessible to everyone involved in the design process and form the basis upon which the designer can be questioned. We have applied the UPDA method and so far the reactions are very positive.