Here's a good guide I'm using: https://www.nomadicmatt.com/travel-t...-a-rtw-ticket/

Not sure how it works for business because I can't dream of ever affording it.

Make sure to price your legs as a multi-leg flight on Google Flights or whatever too, and compare. I think if the price is close, the advantage with the RTW ticket is that there is flexibility, and you can change dates and maybe legs (not sure) during your trip.