Arithmetic operation method and arithmetic operation instruction system

Abstract

An arithmetic operation method in which data processing can be executed no later than a designated date and time upon consideration of a forced stoppage of tasks. The method includes: a simultaneous execution quantity calculation step of calculating a simultaneous execution quantity of the subtasks based on resources used by each of the subtasks and available resources at each time of day; an inexpensive remaining quantity calculation step of creating an inexpensive executability table indicating an inexpensive remaining quantity that is a quantity of tasks which may be executed by the inexpensive execution unit at each time of day on the basis of a completion date and time when the arithmetic operations of the plurality of subtasks should be completed, and the simultaneous execution quantity; and an execution instruction step of causing each of the subtasks to be executed by either of the inexpensive or expensive execution units.