How is it decided which pilot will be the pilot flying that particular flight considering there is every possibility that a Captain and FO have previously flown on different flights. Is this something that is negotiated between the two pilots, or is it something which is arranged by scheduling.
Also how does the load split between the pilot flying and the pilot not flying. Does the switches which each pilot would normally set remain the same.
An example would be the APU start switch in the B747 is directly over the Captain, assuming this is a switch which the Captain would normally operate, would that remain the same regardless of if the Captain is the PF or the PNF? If the FO is the PF, does the FO give "instruction" (sorry, couldn't think of a better word) to the Captain asking for certain actions to be done? Or are there switches which are only really to be operated by the PF?
Also how much can the PNF do independent of the PF, for example say the FO is the PF, can the Captain (PNF) turn on fuel pumps without specifically been asked by the FO (PF) because it needed to be done, or must the PNF await all instructions from the PF. (Obviously regardless of who the PNF and PF is, if a system mode was changed, there would be a call out stating it has been done to the other pilot)
