A Process Decision Log records significant decisions that change how a process is governed, controlled, prioritized, or operated.
The purpose is not to document every routine choice.
The purpose is to preserve the reasoning behind decisions that future teams may otherwise question or reverse without context.
Define which decisions belong
Examples include:
- changing a process rule;
- changing approval authority;
- changing a critical control;
- accepting a temporary risk;
- changing a service priority.
Process Governance helps clarify decision authority, escalation paths, and accountability.
The log should focus on decisions with meaningful operating consequence.
Record the decision clearly
Capture:
- what was decided;
- who decided;
- when it takes effect.
Avoid vague entries such as “agreed to proceed.”
The record should be understandable without relying on meeting memory.
Record the evidence
Important decisions should reference the facts that supported them.
Examples include:
- performance data;
- risk review;
- test result;
- customer requirement;
- capacity constraint.
Process Baseline helps establish the reference condition against which later performance can be compared.
Record assumptions
Some decisions depend on assumptions.
Examples include:
- demand remains stable;
- staffing level continues;
- supplier capability holds.
Explicit assumptions make later review easier when conditions change.
Record expected effects
State what the decision is intended to improve or protect.
Process Performance Management helps connect measures with ownership and operating review.
The log should support later evaluation of whether the decision produced the expected effect.
Record review or expiry timing
Some decisions should be revisited after:
- trial period;
- process change;
- risk reduction;
- new information.
Temporary decisions should not become permanent simply because nobody reviewed them.
Preserve authority context
Decision Rights in Improvement Work helps clarify who decides, approves, recommends, or escalates.
The log should show that the decision was made at the correct authority level.
Where practical, record whether the decision is reversible. Reversible decisions can often be tested quickly with a defined review point, while difficult-to-reverse decisions deserve stronger evidence and broader approval before implementation. This helps the governance process match decision effort with decision consequence.
Common mistakes
Logging trivial choices, recording decisions without reasons, omitting assumptions, failing to define expected effects, allowing temporary decisions to become permanent, recording no review date, and using the log as a substitute for actual governance are common mistakes.
Practical sequence
- identify a decision worth preserving.
- state the decision.
- record authority and date.
- record supporting evidence.
- record key assumptions.
- record expected effects.
- define review or expiry timing.
- communicate the decision.
- evaluate the result later.
- update or close the decision record.
The practical lesson
A Process Decision Log protects organizational memory.
Future teams should be able to see not only what changed, but why the organization believed the decision made sense at the time.