The Purchasing Chessboard model is created by A.T. Kearney.
Kuvan lähde https://dwfoh96rza0z7.cloudfront.net/wp/wp-content/uploads/2015/01/22030058/AT-Kearney.png (5.10.2016)
Mitchelle, Pirre. (2015). How does a CPO Control Spend? Spend Matters. (5.10.2016).
Lähde http://www.mypurchasingcenter.com/files/8013/6870/7305/atk_chessboard_image.png (5.10.2016).
A. T. Kearney (2013). The Purchasing Chessboard. (5.10.2016).
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