John Seddon is a British occupational psychologist. Seddon has grown to prominence as a management consultant following attacks on current British management thinking including: the belief in economies of scale, quality standards such as ISO9000 and much of public sector reform including ‘deliverology’, the use of targets, inspection and centralised control of local services. The Daily Telegraph described him as a “reluctant management guru”, with a background in clinical psychology.He is known for adapting the Toyota Production System and the work of W. Edwards Deming and Taiichi Ohno into a methodology called ‘The Vanguard Method’ for improving performance in service industries. He describes Deming’s and Ohno’s work as “systems thinking”, as opposed to the top-down rigid “management thinking” (or “Command and Control” thinking) that predominates most service industries today. He is particularly critical of target-based management, and of basing decisions on economies of scale, rather than “economies of flow”.