Trend to centralize buying function has had impact on the evolution of retail industry by reforming buying function & making it more efficient. Chose a company that applies the central buying function, explain how implementation done and the reason for adopting this option. In addition, chose another company that applies the decentralization of the buying function, explain how the execution and the reason for adopting this option. Describe their buying teams/committees and the challenges they face in the buying function. ( 500 word)