Reviewer metrics live inside the Team Collaboration Network tab of the Performance Delivery dashboard. They quantify the reviewer side of the PR lifecycle — how quickly reviewers engage, how broadly review work is shared, and how fast PRs reach approval.
All reviewer metrics use calendar hours. Bot accounts are excluded unless explicitly mapped as a user in Leanmote.
The four sub-metrics
Reaction Time — the average calendar hours reviewers take to respond after the submitter acts on the PR (pushes a commit or adds a comment), rounded to the nearest hour. Measures how quickly the review side picks up after the author makes a move.
Sharing Index — measures how evenly review work is distributed across available reviewers in the period. Calculated using a Gini coefficient on the distribution of review comments, scaled by the fraction of available reviewers who actively participated. Output is 0–100, where a higher number means more evenly shared. "Available reviewers" are all people who appeared as non-author commenters or committers on any PR in the period — not limited to the configured team roster.
AVG Pickup Time — the average calendar hours from PR creation until the first review interaction (a comment, approval, or commit from a non-author), rounded to one decimal place. This is the gap between PR creation and the first reviewer engagement.
TT First Approval — the average calendar hours between PR creation and first approval, rounded to one decimal place. Self-approvals are excluded. PRs merged without any approval are not counted in the average.
How to interpret them
A long AVG Pickup Time is the most common review-side bottleneck. Until pickup happens, nothing else can.
A low Sharing Index is a fragility signal — the team is dependent on a small set of reviewers. If those people get busy or leave, throughput collapses.
If Reaction Time and AVG Pickup Time look good but TT First Approval is high, reviewers are engaging but not finishing — the iteration loop is long.
What to do about it
Set a review-pickup SLA the team agrees to (a few working hours is typical for a healthy team).
Auto-assign reviewers from a rota instead of having authors hunt. This raises the Sharing Index almost immediately.
If TT First Approval is the long pole, look at PR size — large diffs slow first approval more than they slow pickup.
Related
Submitter metrics
Team Collaboration Network — overview
Lead Time for Changes