Earned value reporting only works when the numbers behind it come from one controlled sequence. Most failed EVM cycles I would flag as governance problems, not software problems: the schedule was updated on one date, the costs were keyed on another, and someone quietly overrode progress to make the curves look better. The purpose of

A programme update is the project team’s controlled record of what was actually achieved up to a defined data date and what the schedule now forecasts. It is more than changing a few activity percentages. The update should connect site records, schedule status, logic, calculated dates, variance analysis, and the narrative issued with the programme.