Estimation is risk pricing. Developers break the work into known units, multiply by team velocity, then add a buffer proportional to how many unknowns remain. The fewer unknowns, the smaller the buffer.
What they look at
- Screen count and interaction complexity.
- Data model — entities, relationships, migrations.
- Integrations and the auth model for each.
- Permissions and role count.
- Non-functional requirements: scale, uptime, security.
- Deployment and environment expectations.
- Test coverage and QA expectations.
How to make estimates tight
Hand engineers a complete pre-engineering package: PRD, prototype, data model, integration list, and acceptance criteria. That's exactly the package our technical scoping and PRD creation services produce — and it routinely cuts estimate ranges in half.
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