ปัญหาที่เกิดจากปัจจัยภายนอก ได้แก่

Problems caused by external factors, including natural disasters such as floods, storms, rain, cold, too hot, too hot liver, etc. reordered the delay of the system's logistics. Economic and political conditions. Holiday season and holiday emergency etc.

Problems that are caused by external factors such as natural disasters, such as floods, rain. Winter storms too hot into the liver. Liver hot stick out, the delay of the logistics system. Economic and political conditions, holidays, festivals and annual holidays, emergency, etc.

the problems caused by external factors such as natural disasters such as floods, rain storm in winter too hot hot liver liver sticking, etc. The delay of logistics system economic conditions and regular festivals and holidays the Holiday city emergency, etc.