Pull request insights

Getting high-quality data about your pull request workflow is the first step to a better understanding of process changes that improve velocity and quality — and our pull request insights are here to help. Here are some highlights to get started:

Cycle time average graph (on the right) shows how long it generally takes you to close pull requests, and how the situation develops over time. If you close pull requests timely, it trends down. Pull requests left open for several days result in an upwards trend. Aiming to close all pull requests in under a week (or 1–2 days on average) is a good starting point for continuous delivery. Now let's look into what contributes to cycle time.

Cycle time is influenced by many factors. Pull requests in progress graph (on the left) gives a clue into how your ability to close pull requests is affected by the number of pull requests worked on at once by the team. Working on too many pull requests at once can result in longer delivery times, and we recommend adding a work in progress limit to make sure pull requests don't pile up slowing the team down.

Cycle time distribution chart (on the right) shows what portion of pull requests takes longer than expected to complete, and individual pull requests are shown in the scatter plot on the left. Pull requests far above the rolling average line need special attention — it's the code that's been waiting for the longest to be delivered.

Filter the pull request table by status, repository, or author (by clicking the filter icon in the table header) to identify problematic pull requests. Filters are applied to the table as well as the charts above it.

Review time is another important contributing factor to cycle time. Sorting the table by review time helps to identify pull requests that spent the longest in review — or were merged without review at all. The number of pull requests merged without review is reflected in the review rate above the chart.

Once you've identified patterns in your pull request workflow, consider discussing the following working agreements with the team:

— Work in progress limit for pull requests (e.g. we don't leave more than 10 pull requests open at once)
— Cycle time target (e.g. closing pull requests in under 7 days)
— Review time limit (e.g. reviewing pull requests in under 48 hours)