I'm all in favour of going back to post-it notes on the wall. My experience is that you get far better interaction, leading to flowcharts that reflect what actually happen in the workplace. Get everyone involved in a room,give them a pad and a pen, let them write their own descriptions, switch the post-its around, find the weakness and suggest their own improvements.
When you've got the content right, the software you choose to use is just a case of what you consider to give the best presentation which enables everyone to read,understand and practice what you have established by consensus to be the best work practice. For what its worth, I'm in the Visio camp - the technical edition has lots of other applications that are useful, but that's just a personal opinion.