The essence of inventory management is inventory management. 19 15, F. W. Harris of the United States published the economic order quantity model, which initiated the research of modern inventory theory. Prior to this, Italian V. pareto put forward Pareto law when studying the distribution of world wealth, and ABC classification was used in inventory management. With the scientific management, the theory of inventory management has developed greatly, and many inventory models have been formed, which has achieved remarkable results in enterprise management.

Classification of inventory management modes:

(1) Different production and supply situations adopt different inventory models. According to the ordering mode, it can be divided into five ordering modes.

① Regular quantitative mode: the quantity and time of ordering are fixed.

② Periodic uncertain quantity model: the ordering time is fixed, and the ordering quantity depends on the difference between the actual inventory and the highest inventory.

③ Quantitative indefinite model: when the inventory is lower than the order point, the order is replenished and the order quantity is fixed.

④ Non-quantitative and non-periodic mode: the order quantity and time are not fixed.

The above four items all belong to the situation that the supply is sufficient and can be replenished at any time according to the demand.

⑤ Regular quantitative model of limited purchase rate: the supply of commodities is limited, and it needs to be purchased one after another.

(2) Inventory management models can be divided into deterministic and probabilistic models according to supply and demand. The main parameters of the deterministic model are accurately known; Some main parameters of the probability model are random.

(3) According to the purpose of inventory management, it can be divided into two categories: economical and safe. The main purpose of economic model is to save money and improve economic benefits; The main purpose of safety model is to ensure normal supply, at the expense of increasing safety inventory and safety storage period, and to minimize the possibility of shortage. Although there are many models of inventory management, it is the same principle of inventory management to comprehensively consider various contradictory factors to obtain better economic effects.

For the specific detailed model, you can refer to the information in Baidu Library, enter "storage model" in Baidu Library, and click View PPT, which is more convenient and quick to view and looks more comfortable.