The invention relates to a method for generating an optimized sizing plan for improving the efficiency of use of the resources of an IT infrastructure involved in the execution of a plurality of batch operations according to a plan of scheduling, said method comprising: a step (100) of data acquisition, comprising the acquisition of a first dimensioning plan of a predetermined weighting coefficient for each resource of a plurality of resources and parameters d '' predetermined execution of a scheduling plan; - a step of calculating (200) a first value for resource use efficiency; - a step of determining (300) extended execution times of the plurality of batch treatments, as a function of values of quantities of available resources, a step of generating (400), of at least one optimized dimensioning plan comprising selecting new values for the quantity of resources allocated to the at least one optimized dimensioning plan.
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