Method for operating a production facility, comprising at least one unit for processing at least one gaseous mixture, supplying at least one fluid to a consumer, and being supplied with electricity, wherein: - the processing unit operates during periods when the cost of electricity is above a first predefined threshold and during periods when the cost of electricity is below a second predefined threshold, the first threshold being greater than or equal to the second threshold; - during at least one period when the cost of electricity is below the second threshold, at least part of one of the at least one fluids is stored in at least one storage tank in liquid and/or gaseous form; - during at least one period when the cost of electricity is above the first threshold, one of the at least one fluids is at least partially supplied to the consumer from the storage tank, after a steaming step if it is stored in liquid form; and - during at least one period when the cost of electricity is below the second threshold, at least one fluid having a predefined purity, a predefined flow, a predefined temperature and a predefined pressure in the processing unit is produced in a duct of the processing unit; - during at least one period when the cost of electricity is above the first threshold, the electricity consumption of the processing unit is reduced, relative to the electricity consumption of the processing unit when the cost of electricity is below the second threshold, and all or part of the fluid having a predefined purity, a predefined flow, a predefined temperature and a predefined pressure is produced in the duct of the processing unit with purity lower than the predefined purity and/or a flow lower than the predefined flow and/or a temperature lower than the predefined temperature and/or a pressure lower than the predefined pressure, and is characterised in that the fluid produced with lower purity and/or lower flow and/or lower temperature and/or lower pressure is then sent to only one consumer, is possibly being at least partly discharged into the air. - the processing unit operates during periods when the cost of electricity is above a first predefined threshold and during periods when the cost of electricity is below a second predefined threshold, the first threshold being greater than or equal to the second threshold; - during at least one period when the cost of electricity is below the second threshold, at least part of one of the at least one fluids is stored in at least one storage tank in liquid and/or gaseous form; - during at least one period when the cost of electricity is above the first threshold, one of the at least one fluids is at least partially supplied to the consumer from the storage tank, after a steaming step if it is stored in liquid form; and - during at least one period when the cost of electricity is below the second threshold, at least one fluid having a predefined purity, a predefined flow, a predefined temperature and a predefined pressure in the processing unit is produced in a duct of the processing unit; - during at least one period when the cost of electricity is above the first threshold, the electricity consumption of the processing unit is reduced, relative to the electricity consumption of the processing unit when the cost of electricity is below the second threshold, and all or part of the fluid having a predefined purity, a predefined flow, a predefined temperature and a predefined pressure is produced in the duct of the processing unit with purity lower than the predefined purity and/or a flow lower than the predefined flow and/or a temperature lower than the predefined temperature and/or a pressure lower than the predefined pressure, and is characterised in that the fluid produced with lower purity and/or lower flow and/or lower temperature and/or lower pressure is then sent to only one consumer, is possibly being at least partly discharged into the air.