Before and after compare
Compare puts two surveys of one place side by side, so you can show what a change — moving a mesh node, adding an AP, a new router — actually did. Walk the space before the change and again after it, then compare the two from History. The older survey is always Before.
How do I open Compare?
Section titled “How do I open Compare?”From the History tab:
- Filed under a site — open the site’s ⋯ menu and tap Compare surveys….
- Unfiled surveys — tap the compare button (two arrows) on the Unfiled section header; it appears once Unfiled holds two or more surveys.
- No sites at all — tap Compare in the toolbar; it appears once you have two or more surveys.
Compare picks the two newest surveys to start. Change either with the Before and After pickers. Whichever way round you pick them, the older walk is treated as Before. With fewer than two surveys you’ll see “Compare needs two surveys”.
What’s compared?
Section titled “What’s compared?”| Section | What it shows |
|---|---|
| Headline | One sentence such as “Better overall: C → B · 2 rooms better.”, with the Before and After grade tiles (letters shown only when show letter grade is on) and the score change. |
| Key numbers | Points; median signal; Wi-Fi hop call MOS and Internet call MOS (with the worst tenth); roams; longest roam gap; and voice priority for download and upload, when measured. |
| Rooms | Each room’s rating and score, before → after, with the change. Rooms are matched by their saved identity, else by name. Rooms only in the after walk read new; rooms only in the before walk read not walked. |
| Signal distribution | The two signal histograms overlaid — only when both walks carried AP-side signal. |
| Experience | Each experience criterion on both sides, graded with the after survey’s profile. |
The section ends with a methodology note.
How does Compare decide “better” or “worse”?
Section titled “How does Compare decide “better” or “worse”?”- Each survey is graded exactly as in its own report. The two letters are compared only when both were graded the same way — both by the signal grade, or both by the experience grade. Otherwise the headline says they were graded differently.
- One yardstick for experience. Both sides use the after survey’s profile, so a changed profile never reads as a changed network.
- A change must beat the noise. A score must move by more than 5 points, a call MOS by more than 0.2, median signal by more than 3 dB, and the longest roam gap by more than 100 ms. Smaller moves read as about the same, because two walks of one space never take the same path.
How do I share the comparison?
Section titled “How do I share the comparison?”Tap PDF in the Compare toolbar to build a before / after PDF report and share it. It uses your report branding, and shows letters only when both show letter grade and the PDF letter-grade setting are on.