A drill assignment rule or drill rule is a rule that links cube cell areas with related or detailed data to be drilled-through to (the drill-to detailed or related data can reside in any existing TM1 cube on the same TM1 Server instance or reside in any ODBC accessible data, or really any data accessible through a TM1 TurboIntegrator process as discussed earlier).
Drill rules will launch (execute) the TI process that you specify for a specific cube cell area.
Unlike other TM1 rules, drill-rules do not require the addition of any supporting feeders specifically to make the drill work.
As a quick review from an earlier chapter of this book (Chapter 4, Rules), each rule must have an area definition to define for Cognos TM1 which cell values to calculate with a rule. Using areas you can specify which calculations apply to different parts of a cube.
For example, specific calculations may vary from region to region. So, you may need to apply different rules based...