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Ask HN: How do you detect silent data loss in user-facing systems?

2 points by Pepp38 ↗ HN
I’m not talking about crashes, errors, or failed requests.

I mean situations where data is lost quietly: - a user fills a long form, navigates away, and nothing is saved - a mobile browser suspends a tab and state disappears - a background sync never retries, but no error is reported

From the system’s point of view, everything “worked”. From the user’s point of view, their work is gone.

I’m curious: - Do teams actively try to detect this kind of silent data loss? - Or is it mostly accepted as unavoidable user behavior? - Are there metrics, patterns, or tools you’ve seen work for this?

Looking for real-world experiences, not theory.

2 comments of 3

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JohnFen
I have seen many websites that detect if you've entered something into a field or touched some control and then try to switch away from the page. They then pop up a dialog box saying something like "you have unsaved changes, are you sure you want to leave?"
apothegm
Some web analytics libraries will take screen recordings of each user session. (No comment on the ethics of that.) Making a habit of watching those recordings in the early days of releasing a new feature or major UX change is a common pattern for detecting when users give up and supporting theories as to why.