It's an average translation of KHL to NHL points. I've read several studies in the last few years about it.
The biggest drawback is that it's based on players who played roughly an equal number of games in each league in back-to-back seasons during the same period of their career. I think usually it comes out to about .6 rather than .74 though. It depends on who is doing the study and which players they can use which changes every season.
Obviously the biggest thing to note is how even in the NHL, from one season to the next a player can have wild swings in scoring. But I do find that more often than not, the conversation rate is pretty accurate.
This is usually applied across all leagues, KHL, AHL, ECHL, NCAA, junior leagues and European leagues in an effort to rank the leagues rather than just predicting player scoring totals when jumping to the NHL.