Development of Identical Delivery Quantity Model in Inventory Management with Delayed Payments based on Bank Interest Rates and Murabaha Systems

摘要

To compete in intemationa! market,companies must produce better quality products with minimum cost.In order to achieve it,one of the supporting factors is a good and efficient inventory management among company and its distributions.For paying system in the inventory management,the companies are using syari'at and conventional scheme.Identical Delivery Quantity(IDQ)model was employed,to calculate minimum inventory cost for both company and its distributors that are mutually coordinated and collaborated.This model was developed by considering four different interest rates in the credit scheme,such as annuities,flat rate,sliding rate,and murabaha.The objective is to calculate total inventory cost for both company and its distributors with the credit schemes as the payment method.Numerical example of a real case was applied in the developed models.It shows that the murabahah is cheaper than another interest rates and it is more applicable in real system to calculate inventory cost with credit scheme as the payment method.