Usable with a quick edit11 of 11 checks passed
The output is clear, actionable, and covers all required elements. Minor clarification of the Android 14+ conditions could be added without any rework of evidence or logic.
Output
Recommendation: offline sync to iOS 17+ and Android 14+ only
Don't roll out to 100% globally on Friday. Roll it out to iOS 17+ and Android 14+, hold Android 13, and turn it off for Android 12 and older. Marketing's Monday email should go only to the users who get the feature.
| Platform | 1. Crash-free (≤0.2 below control) | 2. Conflict tickets (<2 per 1,000) | 3. Notes synced without error (≥99%) | 4. No data loss | Decision and why |
|---|---|---|---|---|---|
| iOS 17+ | Go: 99.58 vs 99.62 (−0.04) | Go: 0.6 (control 0.3) | Go: 99.4 (control 99.5) | Go: no data-loss reports | Go. Passes all four. The one slow-sync report wasn't reproduced, so I'd watch it but it doesn't block launch. |
| Android 14+ | Go: 99.49 vs 99.55 (−0.06) | Go: 0.8 (control 0.3) | Go: 99.2 (control 99.5) | Go: none logged | Go with conditions. Passes all four, but conflicts are 2.7× control and sync errors are slightly worse. Conditions below. |
| Android 13 | Go: 99.31 vs 99.40 (−0.09) | Go: 1.1 (control 0.3) | No-go: 98.9, below 99% | Go: none logged | No-go. Fails the sync-error criterion. Reopen when it reaches 99% in a new test. |
| Android 12 and older | No-go: 98.71 vs 99.38 (−0.67) | No-go: 4.9 (control 0.3) | No-go: 96.1 | No-go: two overwritten-edit incidents on Android 11 | No-go. Fails all four criteria. The data-loss incidents are the decisive problem. |
Web isn't in the 25% rollout data, so there's no evidence it meets any criterion. It's a no-go until it's tested.
On the data-loss criterion: the two Android 11 incidents count as failures even though engineering recovered the edits from backups. The criterion is "no data loss incidents," not "no unrecoverable data loss." Their root cause is an older Android storage API, which suggests the problem is specific to older devices. The Android 12-and-older segment also fails the crash and conflict criteria by a wide margin, so the storage fix alone doesn't justify launching there.
Why not a global launch
A global launch would put Android 12-and-older and Android 13 users on a feature that fails the agreed criteria. That segment already shows about 36 conflict tickets per 1,000 treated users... no, 4.9 per 1,000, almost 16 times control, and a 0.67-point crash-free drop. Data loss is the most serious harm a notes app can cause, and users who lose work are unlikely to forgive it.
We agreed these criteria before the rollout. Passing three of four on the platforms that matter most is not enough to waive the fourth, and waiving it now would set a bad precedent.
Before Friday
1. Engineering: Confirm the Android 11 storage fix and check that no other users had edits overwritten. Verify the backup recovery was complete. 2. Feature flag: Build a server-side switch that disables offline sync for Android 13 and below. Before disabling it on a device, flush any pending offline edits. Otherwise a user could lose changes made offline during the switch-off. 3. Monitoring: Set daily alerts with rollback triggers. Roll back any enabled platform if any of these happen: - Any data-loss report - Crash-free sessions more than 0.2 below control - Conflict tickets at or above 2 per 1,000 - Android 14+ conflicts above 1.5 per 1,000 (an early warning, since it's already at 0.8)
Monday's email
Don't send it to every user. Send it only to iOS 17+ and Android 14+ users, and only after the feature is live for them. The email should not promise offline editing on web or on older Android versions. If marketing can't segment the list in time, move the email back a week. A broad email would drive users on unsupported platforms to a feature that is currently losing their notes.
Summary
- Launch Friday: iOS 17+ (go), Android 14+ (go with conditions)
- Hold: Android 13 (no-go until sync errors reach 99%)
- Turn off now: Android 12 and older (no-go)
- Web: no-go until tested
- Email: segmented to launched platforms only
Claims the judge couldn’t find in the brief
- The two Android 11 incidents breach the 'no data loss' criterion, even though edits were recovered.
Grades and run details
Decision model 86 · LLM judge 100
Decision model checks
- passUses the supplied evidence correctly33%
- passAddresses the actual decision94%
- partialRespects explicit constraints35%
- passIdentifies material uncertainty97%
- partialAvoids unsupported claims34%
- passProduces the required deliverable82%
- partialChecks every criterion for every platform62%
- passTreats the overwrites as data loss100%
- passLimits the downside of being wrong100%
- passGets the base of every number right28%
- passJudges the launch against a baseline set now58%
Run
- Run
- #1
- API response time
- 26 s
- Submitted
- 8 Oct 2026