Identify the ten questions that drive your biggest decisions, like “Are we growing profitably?” or “Which segments deliver reliable cash?” Build the glossary starting there. For each question, map the necessary KPIs, definitions, and filters. Include explicit time granularity, currency conversion rules, and cohort logic. This approach grounds the glossary in executive reality, ensuring every definition serves decisions rather than academic neatness or tool constraints that confuse rather than clarify.
Write definitions in language that non‑analysts understand, yet preserve mathematical precision. State the formula, list inclusions and exclusions, and give a concrete example with realistic numbers. Note whether the metric is point‑in‑time or rolling, and describe how outliers are capped. Clarity is kindness: when a formula and narrative travel together, stakeholders learn faster, ask better questions, and rely on the glossary instead of inventing local variations that fracture insight and comparability.
Every definition needs a steward, review cadence, and transparent change log. When a calculation changes, record the rationale, effective date, and potential impact on trendlines. Require approvals for high‑impact metrics like revenue or churn, and notify downstream consumers proactively. Ownership reduces ambiguity and prevents silent drift. People adopt standards when they see accountable guardians, timely communication, and a respectful process that balances stability with the flexibility required by evolving business realities.
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