Sometimes you just want to add a sense of urgency to hacking that can't be captured by a single dice roll. You want to have a sense that there's a time limit that they have to adhere to and if they don't make it there'll be trouble. You want to show off the pressure. There they are. Sitting at the computer terminal and trying to hack open the blast doors as enemies fire at them from the balconies and their friends try to provide covering fire by shooting back. But what do you do? How do you represent that? Sure you could have them make a hacking round every turn and hope they slowly accumulate twenty successes in time. That's one option. But that method won't also cut it when the character is slowly hacking a terminal while their friends scout for clues. How long should it take? And how long can you reasonably expect the hacking player to simply watch the others?
You could introduce a mini-game.
I've started using Connect the Dots.
Okay, so not everyone would be keen on it but with some players it does work. It gives them something tangible to do and with a bit of effort and cunning they can hack terminals faster than you might otherwise allow simply by joining the dots faster. Just be sure to not impose it as a punishment. Ask your players if they might be interested and if they are, give it go. It won't be fitting in every situation but it is good on occasion.