1. A computer-readable recording medium that stores therein a computer program for realizing a method of creating a resource plan, the computer program making a computer execute: acquiring an estimation waveform of load fluctuation and a performance value indicative of a performance of each of a plurality of types of computer hardware in each data center that constitutes a distribution system, the performance when performing a task selected from among a plurality of types of tasks relating to a network service operated by the distribution system; calculating a compatibility value indicative of compatibility of a predetermined type of computer hardware with the task based on the performance value, the predetermined type of computer hardware selected from among the types of computer hardware; detecting a load fluctuation estimating value at an arbitral time from the estimation waveform of load fluctuation; optimizing a value of allocating amount of a computing resource based on compatibility and the load fluctuation estimating value; and creating a resource plan of the distribution system based on necessary amount of an equipment procurement in a time slot obtained by totaling the allocating amount of the computing resource.