Critical Path
クリティカル・パス
The critical path is the longest chain of dependent tasks that sets project duration.
The critical path is the sequence of dependent tasks that determines the minimum project duration; any delay extends the deadline.It links objectives, scope, resources, and time, serving as a baseline for alignment and change control.
Clear scope and objectives align priorities and reduce rework in decisions. Visible dependencies make schedule adjustments and resource trade-offs faster. Change and risk impacts can be assessed early, improving alignment.
- Clear scope and objectives align priorities and reduce rework in decisions.
- Visible dependencies make schedule adjustments and resource trade-offs faster.
- Change and risk impacts can be assessed early, improving alignment.
- Define deliverables and acceptance criteria to prevent scope drift.
- Record assumptions, constraints, and exclusions for shared expectations.
- Link dependencies to owners and dates to ease coordination.
- Review progress against the baseline, not just activity.
- Log changes with reasons and impacts to maintain transparency.
Example: If design → build → integration testing is critical, delays there push the release date.When change requests arise, assess impact and renegotiate priorities with stakeholders.Review progress weekly and agree on mitigation if delays appear.Document major changes and approvals for traceability.
Compare Critical Path with adjacent concepts before deciding. Critical Path | Current concept | Use when the team needs the primary decision lens Adjacent metric or framework | Supporting lens | Use when the team needs evidence or process detail General vocabulary | Broad explanation | Use only for orientation, not final decision-making
| Metric | Difference | Why read together |
|---|---|---|
| Critical Path | Current concept | Use when the team needs the primary decision lens |
| Adjacent metric or framework | Supporting lens | Use when the team needs evidence or process detail |
| General vocabulary | Broad explanation | Use only for orientation, not final decision-making |
- Plans are not immutable; controlled changes are expected.
- More detail is not always better if it raises maintenance cost.
- Documentation alone does not deliver results without execution.
When should I use Critical Path?
Use it when the team needs to decide scope, priority, owner, or trade-off, not when it only needs a short definition.
What makes Critical Path useful in practice?
It becomes useful when it is tied to evidence, a decision owner, and a concrete next operating choice.
What should I avoid?
Avoid using the term as a label without clarifying assumptions, boundaries, and how success will be judged.