The decision support that was de-normalised was just along for the ride.
The application got quite complicated with all the business requirements. We needed long lists of things for the calculation (Budget, Actual, etc.). The Decision Support tables would summarise the long lists for reporting and analysis.
I have to say that the application was quite fun except for the 2-hour meetings that ended up with 'ingore all that we discussed here, we'll have to try again'.
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