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The "Challenge 25" model was created by Graham Woodison to help companies and supplies find better ways of working, achieve optimum quality, identify and reduce risk, look for value add and reduce costs. The author has developed and used this principle throughout his 30 year commercial career, working across a number of private and public sectors. Suppliers like it because they can use it to with their suppliers to improve their business performance and profitability. It's simplicity to use and communicate makes it a highly efficient method to improving the overall business. Equally there is no reason why these principles cannot be used in our own personal life.

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