Answer:
This task is a hard one and could only be done by professionals like m- eem.. professionals.
But you should try and figure out all the staffs daily routine. Then you could take the staff with a key down sometimes when he's alone. I would recommend using parafyl- i mean some liquid that i dont know about.
Then you try and bypass the alarms or trigger them and just run away. Always hide your face and fingerprints. Lay out your escape ruit before you run.
I mean THEORETICAL of course (wink wink ;D )
You need to define the term yourself. There's no set definition for it. For example when we say "This will be a long wait" you don't know the time of "long" the definition of "long" will vary per person just like "jiffy".
There are five principles you need to consider in order to reach this goal: creativity, credibility, intellectual stimulation, relevance and emphasis.