予算
Budget / バジェット
A budget is a planned allocation and limit of resources or costs.
A budget estimates required costs, sets spending limits, and allocates resources to guide cost control.It links objectives, scope, resources, and time, serving as a baseline for alignment and change control.It supports decisions to protect quality and schedule.
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: Separate labor, vendor, and contingency costs, then review variances each month.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 Budget with adjacent concepts before deciding. Budget | 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 |
|---|---|---|
| Budget | 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 Budget?
Use it when the team needs to decide scope, priority, owner, or trade-off, not when it only needs a short definition.
What makes Budget 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.