Plain English Meaning
When you are flying alone, you are the captain, the copilot, the navigator, and the workload manager. SRM is the set of habits and skills that helps a solo pilot use everything available — instruments, charts, ATC, autopilot, checklists — to stay ahead of the airplane and make good decisions.
Full Definition
Single-pilot resource management is the art and science of managing all available resources — both inside and outside the cockpit — to ensure the safe outcome of a flight when operating without a second crew member. It applies the principles of crew resource management to the environment, covering , , , , , and the use of checklists, charts, , , and any other available aid.