締切
Deadline / デッドライン
A deadline is the agreed date by which a deliverable must be completed.
In projects, a deadline is the committed date for completion or submission of a deliverable and drives scheduling and prioritization.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: Set design and code-freeze dates by working backward from the April 30 launch deadline.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 Deadline with adjacent concepts before deciding. Deadline | 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 |
|---|---|---|
| Deadline | 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 Deadline?
Use it when the team needs to decide scope, priority, owner, or trade-off, not when it only needs a short definition.
What makes Deadline 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.