Disclosed is a management device that can determine the greenhouse gas emissions per product unit associated with the production of said product, said management device being equipped with a utility management device (102), which records and manages an incoming power from outside, cooling/heating input, private power generation equipment operation results, and cooling-heating equipment operation results, a materials management device (104), which records and manages materials and starting material usage results, a facilities management device (105), which records and manages energy used by facilities and equipment during a production period, a manufacturing execution management device (103), which manages product production results, an emissions computation means, which computes the greenhouse gas emissions from the various results recorded and managed by the utility management device (102), materials management device (104), facilities management device (105), and manufacturing execution management device (103), an emission allocation means, which allocates in product units the greenhouse gas emissions computed by the emission computation means, and an emission management device (101), which manages the greenhouse gas emissions data allocated to a manufacturing lot as intrinsic data of the lot.
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