Abstract: Recently,as the development of third party logistics(3PL),the service provided by 3PL is more professional.Considerable manufacturers out source their order delivery to 3PL in order to reduce the delivery cycle time.This paper investigates the synchronized 3PL scheduling problem,where the scheduling is determined by the manufacturer in the context of JIT delivery 3PL provides the detailed information including vehicle departure time,arrival time and available capacity Manufacturer determines how to employ the service provided by 3PL,considering the production schedule and delivery requirement,in order to a chieve JIT delivery with minimized cost The mathematical model is proposed in this paper Also,the computational complexities of the problem are investigated Finally,the computational complexities are tested by numerical experiments.

Key words: supply chain, JIT, 3PL, transportation scheduling