1. A production cell comprising a plurality of work performing elements for performing work, and an information processing device for commanding work tasks, connected to the respective work performing elements by communications means; wherein said information processing device outputs a command consisting of a set of task units assigned with an execution sequence, to each of the work performing elements; and the work performing elements each store operating programs for respectively executing one or more task units, and perform work by executing the operating programs in the order of the execution sequence, on the basis of the set of task units with an assigned execution sequence output by said information processing device.