I honestly don't think there is any algorithm. For all the bluster and commitment to being "data driven", none of the companies I've seen mandate RTO have provided any sort of data-driven reason why it needs to happen. Amazon's policy might as well be "Jassy feels it in his gut that RTO is better for the company so we are doing it".

All the communication of RTO invokes the most fanciful and vague references to "magical hallway conversations" and "increased collaboration" without a single data point to back up any of the claims.

It has been almost humorous to watch such stalwarts of "data driven decision making" turn up a giant goose egg with respect to actual evidence on such a huge, impactful, and far reaching decision.