733driver
An excellent point about flows. The checks double barrel have are a flow. They start at the floor mounted fuel selector and make a counter clockwise circle around the instrument panel to end at the seatbelt
Also you are absolutely correct between SOP and a checklist.For example I teach that the initial climb to 1000 ft AGL is done st 76 kts (Vy). That is not on any Checklist it is s SOP
Also there seems to be a lot of confusion between “checklists” and “do lists”. A checklist is something you do after completion of all items by means of a flow. A do list is something you do item by item. For single pilot operations in small aircraft my checks are do lists for checks when the aircraft is stopped or in cruise flight and checklists for the other in flight checks
do list
prestart, taxi, before takeoff, cruise, descent, shutdown
checklist
line up, prelanding, after landing