In regulated environments there are potential disadvantages to documenting the current adhoc process in all its glorious confusion -- we may be audited to see if how the group operates in practice adheres to the letter of the documented process. If the culture is particularly compliance-oriented, then perhaps we end up "I'm sorry, to comply with our documented process, we can't proceed to step 5 until after the IT guy has returned to work. Since he's still at work today we'd better pause until he clocks off then returns tomorrow".