[rules-users] Rules for Hierarchical Type Calculation Formulas

We have been using a custom rules engine successfully for our 1000+ rules for our student loans application, but these rules are decision based types rules (if then else). For assessing loan amounts for our student loan application, we have over 400+ calculation formulas plus decision logic. These formulas are mostly simple: TotalEligilbleLoanAmount = Min(TotalNeed - TotalResource, MaxAllowedAmount) TotalNeed = Tuition + LivingAllowance + ChildCareExpenses ChildCareExpenses = NumberOfChildren * PerChildAmount TotalResource = EmploymentEarnings + Scholarships + Assets (however there are 400+ formulas and the hierarchy gets up to 20 deep) Is it possible to implement something like this in Drools? Will it be maintainable and performant? Thanks Don This communication is intended for the use of the recipient to which it is addressed, and may contain confidential, personal, and or privileged information. Please contact us immediately if you are not the intended recipient of this communication, and do not copy, distribute, or take action relying on it. Any communication received in error, or subsequent reply, should be deleted or destroyed.