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Six Sigma

Imagine you are the quality control manager of a business that manufactures bolts. Some of your bolts are used in the aviation industry and hold together key parts of a passenger aircraft – let’s say the wings! You have two clients and the bolts you make for the second client are used to screw together furniture designed for living rooms. The bolts for the plane are made from an expensive alloy that can withstand extreme temperatures and pressures and are fixed to the wings using a high precision process involving robots. The furniture bolts simply need to be straight, of the correct length and easily fixable. Your factory produces hundreds of bolts for each client, but clearly meeting the exacting standards of your aviation client is by far the biggest challenge. Each bolt has to be perfect, there is virtually no room for error – but just how rare can a bolt with a fault practically be?

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