Supplier C who supplies vegetables of broccoli, bit root and green lettuce is more appropriate to use inventory policy of speculation. This suppliers need to speculate in supplying the three items as in order to anticipate changes in demand level. This vegetable’s varieties are difficult to be obtained and require a relatively long lead-time. The nature of the supply chain capability of the growers / collectors cause the supply chain unreliable compared to other supplied varieties. As for the other vegetables, the policy of postponement is proper in managing inventory regarding to the relatively short lead-time, where the supply chain is reliable in both delivery amount and delivery and strong bargaining power held by the supplier.