10 — Flawless execution, no visible breakdown
8–9 — highly efficient, very small imperfections
6–7 — usable, but clear inefficiencies
4–5 — major breakdown affecting force transfer
1–3 — severe collapse, poor execution
0 — miss or failed lift
Examples with RPE:
RPE 9 / EZ 5 = very hard set with obvious breakdown
RPE 9 / EZ 8 = very hard set with strong execution