GarageYears, I think "synching" in context would be more like deriving a full sequence of events: A leads to B leads to C and D. C leads to E ... D leads to H, I, and J... Once that is done they have to figure out what the precise timing of each of these events in the cascade mean.
Everything is in order with even times. Now, how do those times really evolve into an event tree? Did B really cause C and D or was something else the real cause? This is where the brain burns out from the complexity that can evolve. (I presume they have procedures derived from long experience to mitigate the complexity exceeding brain capacity. Computers will help. But without the human brain and its experience computers might give quite inaccurate results even accounting for reaction times.)