If your dev team lives in Jira but your clients report bugs somewhere client-friendly, you're running two systems on purpose — and that's fine. The client-facing layer keeps clients out of Jira; Jira keeps your developers in the workflow they know. The trouble starts when you have to keep the two in step by hand.
Estimation is where that hurts most. You size a bug for forecasting and retainer tracking, then someone re-types the same number into the Jira story-points field. Two entries, two chances to disagree, and within a week your forecast and your sprint board are telling different stories.
Why Double Entry Drifts
Manually copying estimates between tools fails the same way every time:
- It gets skipped. Re-typing a number into a second system is exactly the kind of low-value task that quietly stops happening when things get busy.
- It goes stale. You re-estimate a bug after digging into it, update one tool, forget the other. Now they disagree and nobody's sure which is right.
- Nobody trusts either number. Once the two have drifted a few times, the team stops believing either system — and an estimate nobody trusts is worse than none.
The fix isn't more discipline. It's removing the second entry entirely.
One Source of Truth, One Direction
The clean model is to decide where estimation lives and let everything else follow.
Estimation belongs in your client-facing layer, because that's where it does double duty — driving your delivery forecast and your retainer burn-down, neither of which Jira tracks for client work. So that's the source of truth. Jira gets a copy.
Crucially, the sync goes one way. When you set or change an estimate, it pushes to the linked Jira issue as story points. Jira never pushes back. That one-directional rule is what keeps it sane: there's exactly one place estimates are decided, and exactly one place they flow to. No tug-of-war, no "which number wins."
How Lantern Helps
Lantern treats itself as the source of truth for estimation and keeps Jira in step automatically.
Set the estimate once, in Lantern. Size a bug on the issue, in points or hours. That's the only place you enter it.
It pushes to Jira as story points. If the issue is linked to Jira, Lantern writes the estimate to your Jira story-points field — converting from hours to points first if that's your unit. Your sprint board and your developers see the same number you set, without anyone re-typing it.
It never reads back. The sync is one-directional by design. Lantern is where estimates are decided; Jira is where the dev work happens. Nothing in Jira can quietly overwrite the number your forecast depends on.
The result: clients report bugs in a tool built for them, your developers stay in Jira, and the estimate that drives your delivery forecast and retainer tracking is the same one on the sprint board. Set up the connection on the Jira integration page.
Related: How to estimate bug fixes · Bug tracking and Jira · Forecasting delivery for agency clients
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