An integrated inventory model with partial information and controllable lead time and its algorithm

It constructs an integrated inventory model including one supplier and one retailer. This model takes order quantity, number of deliveries and lead time as decision variable in order to optimize the integrated annual expected total inventory cost of supplier and retailer and make it approach optimized solution. At the same time, this model supposes information on demand during lead time is imperfect and lead time can be controlled and reduced at an added cost.