I don't know if you are interested or not, but I will try to explain.
As you brobably know, Egypt had only relative dating. Only the years a pharao ruled were counted, we can get absolute dates only by adding those individual data.
Unfortunately there are periods from which we have no reliable dates, for example the intermediate periodes where several people ruled as pharao over parts of Egypt the same time.
We can synchronize this with some so-called sothis dates down to the middle kingdom, but the time before, the first intermediate periode, is very uncertain. It could have lasted 100 years, or 200 years. Nobody knows for sure.
The biggest problem is dyn IV itself (and III no less). We simply DON'T KNOW how many pharaos ruled in this time. The "Chufu-Clan" was big, and we have several names in cartuches from which we have no archaeologic trace (eg. Bafare & Djedefhor)
And: During the 4th dynasty there was a change in measuring the periode of reign of a pharao. It was not measured in calender yers then but in cattle counts. We are sure that at the beginning of Dyn IV this was biannual, and that it wa annual under Schepseskaf at the end of the periode. But we don't know when it switched. The only thing that is sure is that it must have happened before Menkaure.
Under Djedefre? (he then ruled 16/22 years instead of 8/11 as are assumed today), Under Chufu? He ruled 24 or 48 years. Or under Snofru? Did he rule 35 or 70 years?
To clear up these questions many buildings (not only pyramids) were probed to establish a dating net to get a fix for these dates.
And now I await your sneering oneliner you surely have in store...