An hourly estimate is the number of hours expected to complete a task or project. It helps a project team plan its timeline, resources, and budget. Unlike story points, which express relative effort, an hourly estimate expresses expected time. It can be useful when deadlines and budgets are tight or when a consultancy needs to bill a client for its work. section 7.2 section 7.2.1
A lead developer helps prepare project estimates, but the developers doing the work should help shape them. Early estimates follow a proposed technical approach and may change as requirements become clearer. Gather feedback from stakeholders and the team, then refine the estimate rather than treating the first number as final. section 1.2 section 7.2.3
To make an hourly estimate more useful:
- Clarify the requirements and scope: what work is included, what is excluded, and which dependencies must be met. Check your understanding with developers and the project manager before work begins. section 7.2.1 section 7.2.3
- Break the project into manageable tasks. Use time spent on similar work as a guide, and account for factors such as the availability of people who must collaborate. section 7.2.1
- Review the estimate as the work develops, allowing for unexpected roadblocks. Communicate timing and progress to the project manager regularly so plans can be adjusted. section 7.2.1 section 7.5.3
A scope change that affects the estimate
Suppose a developer adds unrequested features to improve a project. Even if the additions seem helpful, they take time that was not included in the agreed scope. Discuss the proposed change with the project manager before doing the work, then revisit the estimate if the scope changes. section 7.2.3
An estimate that is too low can push a team toward overtime, missed deadlines, and burnout; one that is too high can delay delivery and use more resources than necessary. The goal is a realistic planning figure, supported by team input and updated when circumstances change—not an unchangeable promise. section 7.2 section 1.2
