Developers estimate against what they can see. If they can see screens, workflows, data, and integrations, you'll get a tight estimate. If they can see a paragraph, you'll get a range — usually 3x to 10x.
The detail required to estimate well isn't about volume of documentation. It's about the absence of unanswered questions in the areas that actually drive cost.
The minimum to get a real estimate
- A list of every screen and the actions on each.
- User roles and a permissions model.
- Data model — entities, relationships, and the source of each field.
- Integrations and the auth method for each.
- Non-functional requirements: scale, uptime, compliance.
- Acceptance criteria for v1.
Why this works
Estimating becomes arithmetic, not divination. Engineers can scope each screen, each integration, and each role, then add a known multiplier for QA and deployment. This is the output of our PRD creation and technical scoping work — and the input development partners ask for.
Want estimates that hold up?
Start with the readiness assessment or talk to us about a Development Readiness Review.
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