The influence of formal representation on solution specification

The effectiveness and value of a notation is determined by how well its users are able to work with it. This paper reports upon an empirical study aiming at investigating the influence of employing the Z specification notation upon how users approach system development. The study illustrates how the desire to employ formality can have a significant influence upon preferred choice between different solution approaches. Despite the formal representation increasing the awareness of the characteristics of a given design problem, the notation is apparently detrimental in the subjects' consideration of good-quality generic solutions. The human factor issues of the notation need to be carefully considered and the notation should be embedded into a proper method if effective use is to be achieved.