Method of Procedure documents are where the site turns a planned change into a controlled sequence. The point is to avoid side effects: an operator should know exactly what is being isolated, what is expected to change, and what conditions must be verified before the next step is allowed.
- Use clear prerequisites and lockout points.
- Step through the change in a sequence that can be checked.
- Define hold points where the team pauses and validates.
- Include rollback or abort criteria.
Uptime Institute describes MOPs as step-by-step sequences for actions that change equipment state, such as breaker switching or valve operations [[1]](https://journal.uptimeinstitute.com/the-making-of-a-good-method-of-procedure/). That is why MOP quality matters so much: every extra assumption becomes a potential outage path.
Sources: Uptime Institute: The Making of a Good Method of Procedure · Data Center Dynamics: Ensuring critical facility operations success · Uptime Institute: Operational Sustainability
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