I ask the questions the proposition: can (or should) Decision Tables be used as in a pseudo-relational manner?
In the second part of the series I post that there is a theoretical breakdown of decision models purely based on Decision Tables. Decision Tables are a useful and powerful metaphor for some aspects of decision modeling. But overuse can create serious issues when it is time to digitize the model.
The suggested existence of the relations or (inferancing relations) between tables asserts that there is a well formed function that can connect these. This is evident when the predicates are pure data types; however, decision tables can contain functions, such as the functions common to decision tables the relations break down.
My regular readers will know that I am taking aim at the Decision Model Approach. We are now working with a number of clients to 'Fix' there radically flawed and unstable models that have been built this way.
My central issue with the decision model approach is that, events and process become buried in the approach. Our recent experiences prove this.
- Tom Debevoise