Project Historical Database Development

What a historical database is

This lesson closes a loop that's run through the whole platform. Reliable estimating depends on good norms (Planning & Scheduling); norms depend on good measurement (productivity); and factored estimates, location factors, and escalation all rest on historical data (Cost Estimating). The historical database is where all that captured data lives — the organization's accumulated memory.

Why build one

• Better estimates — Real actuals — productivities, unit rates, factors — make future estimates accurate instead of guessed.
• Credible benchmarks — Completed-project data is what you validate new estimates against (Cost Estimating Lesson 30).
• Living norms & factors — Productivity norms, location factors, and escalation indices stay current as new data flows in.
• Organizational learning — The company gets smarter with every project, instead of repeating the same estimating mistakes.

Building a usable database

Raw actuals aren't directly reusable — they have to be captured in a consistent structure and normalized so projects can be compared. The essentials:

Making it stick

Make capturing data a mandatory closeout deliverable, store it against the same code of accounts the estimates use (Lesson 2), normalize consistently, and treat the database as a maintained asset — not a one-off. The payoff compounds: the more projects feed it, the sharper every future estimate, norm, and benchmark becomes.

Nine things to remember

1. A historical database captures actual data from completed projects for reuse.
2. It closes the measure → norm → estimate loop across projects.
3. It feeds better estimates, benchmarks, norms, and factors — the whole estimating chain.
4. The data window closes at project end — capture it as a closeout deliverable.
5. Capture → normalize → store → reuse is the pipeline.
6. Normalize for date, location, and units — raw actuals aren't comparable.
7. Store against the same code of accounts the estimates use.
8. Make it a maintained asset — the payoff compounds with every project added.
9. It's a quiet competitive advantage — organizations that keep it estimate better.