[clusmore]

> Some people would use the remote time for personal matters and chalk up a day with limited output to ‘I was doing research’

Be careful with this, because it can be a form of selection bias. I've run plenty of errands and had plenty of non-productive days from the office too. This stuff is unavoidable. If you're going to put WFH under intense scrutiny, make sure to put office work under the same level of scrutiny otherwise it might just be that you notice unproductive days more because you're looking harder.

At a previous company, the WFH policy included a question "How will your performance be measured when working from home?" to which I answered "The same as when at the office", but the question implies a level of suspicion that sets the tone for the whole thing. If you want to allow WFH but are concerned about productivity, do it in good faith and allow enough time to get a statistically significant sample size, and actually compare it with office work rather than just looking at the raw numbers in isolation.

Edit to add: You might also find that people will choose to WFH on days they were planning to run errands, but they likely would have anyway had they worked from the office, so you need to account for this too.