| With the rapid development of economy and society,the competition mode has gradually changed from competition between enterprises and enterprises to competition between supply chains composed of upstream and downstream enterprises.There are many SMEs in the supply chain,and these SMEs are often constrained by funds.When SMEs own funds that cannot fulfill their ordering needs,their ordering decisions will be closely related to financing decisions.By combing the existing research theories,it is found that small and medium-sized retailers in the supply chain have two main options when faced with financial constraints: internal financing and external financing.In addition,in recent years,deteriorating items have become the most frequently consumed category in daily life,and have become the object of vigorous development of many e-commerce companies,but such products are easily worn out and consumer demands are constantly changing over time.Therefore,based on the time value of money,this paper starts from the perspective of capital constraints in the process of purchasing deteriorating items from the small and mediumsized retailers in the downstream of the supply chain,and explores the optimal ordering strategies and profits under internal financing and external financing by constructing an order model that can cover the demand functions of different life cycles.This paper further studies how the optimal ordering strategy of retailers under internal financing and external financing changes under the influence of different factors such as loan interest rate,inflation rate and commercial credit period.This paper also compares internal financing with external financing for retailers to decide how to choose the optimal financing model,and how to correctly determine the optimal order quantity for different procurement cycles within a limited time frame after selecting the optimal financing method.And the optimal out-of-stock quantity,so that retailers can further reduce inventory costs and increase production efficiency in practice,thereby increasing the value of the overall supply chain. |