A person or device that determines a schedule, that determines the order that tasks are to be done.(noun)
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Use "scheduler" in a sentence
"After calling the court scheduler from the courtroom, Verser set a court date of 9 a.m. on Feb. 5."
""I read the story about the design, and that the kids had been trying to set up an appointment with me and were unsuccessful - so I called my scheduler and told her to get them in," Rendell said."
"Short term scheduler, also know as a dispatcher executes most frequently, and makes the finest-grained decision of which process should execute next."