here are some assumptions I make about jumping
Nobody has discussed energy. I would imagine that jumping would take a comparatively high amount of energy (why else would conventional travel be preferred to jumping if no other factors). If that's the case then more fuel would be used jumping (the game makes several references to ships using deuterium based fusion reactors.) so you then go into fuel supply's on board do civilian craft carry large enough for many jumps also what is the cost of deuterium high/low? what is the energy demand in system jumping compared to inter system jumps
accuracy of navigation systems/drives, Knossos devices are known to disrupt transit, does gravity (Star Wars), is matter density in real space a factor?
Transit times, System-System transit can take many mins (destruction of Lucifer) many briefings mention arrival times and transit times how long does in system jumps take, does physical distance have an affect.
warm up / cool down times, this is again hinted at but applied inconsistently, if you know your enemy just jumped then you know you can ambush them while the recharge their engines, if your recharge cycle is faster than the enemy then you can still whittle down ships by perusing, a tactic made available with subspace tracking, does length of time in subspace affect this