How to avoid performance issues when setting up approval rules in Procurement

We would like to know the best practices to prevent performance issues when configuring approval rules in the Oracle Procurement modules.

Our customer has experienced in the past that, after increasing the number of approval rules, workflows stopped running correctly due to performance degradation. They are now planning structural changes in their organization (moving to position hierarchy) and need to rebuild part of their approval setup.

Could you please share Oracle’s recommendations or any reference documentation on how to design or manage approval rules efficiently to avoid these performance issues?