A driving apparatus is controlled by using a driving command that is obtained by applying an accelerator operation amount to a relation between the accelerator operation amount and the driving command for the driving apparatus, and the relation is set by using a distribution of usage of the driving command by a driver such that a gradient that is a change in the driving command with a change in the accelerator operation amount in a high usage range including a value having a longest usage time among values of the driving command is less than the gradient in a range other than the high usage range.