In reality the representatives from the parties to the investigation all travel to the manufacturer of the Black Box, have a pre-meeting to agree on the course of action (opening the box, plugging in slave modules etc. to bypass any damage and then decoding chip sets etc). Then whoever wants to can stand around watching all this happen (boring as hell) and once completed somebody can display it on a monitor screen. Then more meetings to decide on how to graph or print out the stuff. About one or two technicians doing the real work and the rest watching while drinking coffee. Once the stuff gets printed out on a piece of paper then you typically circle areas of interest and decide how to proceed further.
For all I know they might even have gotten this far already