Bottom-Up Estimating
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Definition
A method of estimating project duration or cost by aggregating the estimates of lower-level components.
Category
Cost
Standards
- ECO 2026 — PMP Examination Content Outline 2026
- PMBOK 7 — PMBOK Guide, 7th Edition
- ISO 21502 — ISO 21502:2020
Source references
- PMI, PMP Examination Content Outline (2026)
- PMI, A Guide to the Project Management Body of Knowledge (PMBOK Guide), 7th Edition
- ISO 21502:2020, Project, programme and portfolio management — Guidance on project management
Cite as
Al Sawady, B. (2026). "Bottom-Up Estimating." Bayhas PM Lexicon. https://lexicon.bayhaspm.com/en/terms/bottom-up-estimating (version 2026-08-30)
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