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Bulldog Tools - Wikipedia — Bulldog Tools is a British manufacturer of gardening and agricultural tools based in Wigan, Today it is owned by the Rollins Group based in Harlow in Essex who acquired Bulldog Tools in 2004. 2010, as part of its 230th anniversary celebrations, Bulldog Tools manufactured the world's largest spade at its forge in Wigan.

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Six Sigma - Wikipedia — Six Sigma (6σ) is a set of techniques and tools for process improvement. It was introduced by standard deviations of a normal distribution the fraction of defect- free outcomes corresponds to. Motorola set a goal of "six sigma" for all of its manufacturing.