Arithmetic apparatus and program operating method

A program operating method executed by an arithmetic apparatus including a memory capable of reading and writing at high speed, a non-volatile storage device that stores an OS that is an operating system not compatible with real-time processing, a management object program that cannot be activated simultaneously with another management object program, a background program that executes the management object program, and a management program that manages the management object program, and a central processing unit that executes the OS, the management object program, the background program, and the management program, the method comprising:

• by the background program, generating one or more temporary processes by the OS, storing the management object program in the memory, selecting a selection process that is one of the temporary processes, and associating the selection process with the management object program stored in the memory;
• and
• by the management program, causing the management object program associated with the selection process to operate, without generating a new process, when the management program receives a command to start the management object program.