Support Packs & Stacks - Modified SAP Objects

Is there an <<efficient>> way to identify what SPAU/SPDD conflicts we will run into when applying a SP/SPS before actually impacting the system by beginning the patch application process?

Identifying the conflicts before system up time and features are impacted gives our project team the lead time that they need to determine a proper course of action, without having to be available at all hours to make a quick decision.

Thank you,

John