Chapter 6. Do’s and Don’ts
The previous chapters define the IDEFO method in terms of its concepts, its language, and its pragmatics. To be considered formal, any method needs to have a documented set of rules that must be obeyed, and IDEFO has proven itself to be a formal method. For example, one IDEFO syntax rule is that there may not be more than six activities on a diagram; a semantics rule is that a label on an arrow branch restricts the flow of data on that branch; and a pragmatics rule is that the arrows on a diagram should be bundled to match the level of detail of the activities on that diagram.
Since the formal elements of the IDEFO method have thus been defined above, this book could end here and be a complete description of IDEFO. ...
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