PURPOSE: To suitably manage job frame information made into large scale and complicated.

CONSTITUTION: A job frame 1 is composed of a basic area part 1A defined as a fixed length and an extended area part 1B defined as a variable length. Information regarding the basic area part 1A in pieces of job frame information is stored in a fixed length information storage area defined as a fixed length as an area constituting a management table 3, and information regarding the extended area part 1B in pieces of the job frame information is stored in a variable length information storage area 51 defined as a variable length as an area constituting the management table 3. The variable length information storage area 51 is pointed by a pointer 42 in the fixed length information storage area 41.