Facebook Lite on Android opens are down 10% when you got into the office this morning. Diagnose the issue.

This question is about problem diagnosis and it's trying to probe your troubleshooting skills and ability to analyze a situation under pressure.

The first step is to understand what you're dealing with. The app opens refer to when a user clicks on the Facebook Lite app and the app launches successfully on an Android device. If these opens are down by 10%, we're seeing a decrease in the number of users being able to successfully open the app.

You should start to think along several lines:

1. Recent changes: Has there been any recent updates or changes to the Facebook Lite app? A recent deployment may have introduced bugs affecting the app opening.
2. Device compatibility: Are specific Android devices or Android operating system versions affected?
3. User behavior: Is this a regular pattern; maybe attributed to seasonal user behavior or a sudden change or drop?
4. Network and server status: Were there any server crashes or networking issues that might have affected users' ability to open the app?

There could be multiple factors at play here. First, I would check our deploy log to see if there have been any recent updates or changes to the Facebook Lite app. A recent deployment may have introduced bugs or issues that could have affected user experience.

If no recent changes have taken place, I'd move on to verify if there were any incidents reported on the servers we use. Server crashes or network issues can also affect user ability to open and access the app.

Then I'd draw out a comparison of the app opens by Android OS versions and devices. If the drop is primarily experienced on a particular version or a device, it may indicate a compatibility issue.

Also, I'd want to compare this data with historical patterns. A drop might just be a part of a cyclical pattern or due to seasonal trends in user behavior.

Lastly, it would be prudent to check if Facebook made any global changes that might have affected user logins or access to the Facebook platform in general.

While diagnosing this issue, I would start by understanding if specific Android devices or versions are more affected than others. This might suggest compatibility issues or bugs associated with specific devices or OS versions.

Next, I'd look into whether any new features or updates were rolled out before the problem occurred. It's possible that a new update could have introduced a bug that's causing the drops.

Then, I would consider looking at the user behaviour patterns. It could be a time when users are typically less active. To verify this, I’d compare the drop against similar previous periods for any patterns.

I'd also check if there were any reports of recent server or network outages. These can impact user ability to access and use the app.

Lastly, I'd check if there were changes to Facebook regulations or user privacy policies that might have resulted in decreased user activity. Being a Facebook Lite user, any platform-wide changes on Facebook that affect access or usage will likely have a knock-on effect on the usage of Facebook Lite.