Why a RAG status is not a health score
A weekly RAG tells you what is happening now: budget amber, schedule slipping, two risks escalated. It is a symptom report. It rarely tells you why, and it almost never tells you early.
Programmes do not usually fail because a task slipped. They fail because the steering group had no real decision authority, because the business case stopped being maintained, because nobody assessed the change impact on the roles that had to absorb it. Those conditions are visible months before they show up as a red RAG — but only if someone asks about them systematically.
The Programme Health assessment is that systematic question set, scored, tracked over time, and placed next to the delivery signal so the two can be read together.