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Planning & Scoping an Audit2 / 12

Defining Scope & Following a Protocol

Levels of audit (walk-through, detailed, investment-grade), standards and scope.

9 min read · Jacob Willis, Net Zero Lead · Last reviewed July 2026


Every disappointing audit shares the same post-mortem: the scope was never pinned down. The client expected the warehouse included; the auditor priced for the offices. The report arrived without the sub-metered analysis finance wanted, or with three weeks of logging the budget never covered. Scope is where an audit succeeds or fails before it begins, and protocols exist so that two competent auditors, given the same site, would produce comparable work. This lesson covers how to define scope precisely and which protocol to follow.

In this lesson

  • 01The five scope decisions
  • 02Protocols: borrowed credibility
  • 03A one-page scope template
  • 04Sources and further reading