Abstract: Supplier Scoring is used to rate Supplier performance.Impact on Supply Chain surplus and total cost is the basis of comparison between suppliers.If sourcing process is effective it improves profits for the firm and total supply chain in various ways. A firm may like to keep a supply   chain function  in  the  house if   outsourcing increases the third party power significantly. Firms often like to keep the  supply chain function in the house, if there is a chance to leakage of intellectual property or other sensitive information,  especially when  the third party also serves the competitors also.Since late 1990s the trend of outsourcing a greater range of  supply chain function has been growing.With more globalization of business customers are looking for players, who  can manage virtually all aspects of their Supply Chain, which is being called 4PL.A  4PL is an integrator ,who assembles the supply chain resources, capability and technical areas of its own and other organization to design, build and run comprehensive supply chain solutions. Keywords:Supplier, 3PL,4PL, Sourcing,Supply Chain Management etc. Introduction: Sourcing is the whole set of business processes, which is necessary to buy goods and services required by the Supply Chain. Most important decision for a supply chain function is whether it is feasible to outsource or perform the function in- house. When a Supply Chain […]