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Statistical quality control techniques are based on the theory of

  • Statistical quality control uses a mathematical and statistical approach and makes use of that branch of applied mathematics based on the theories of probability.
  • Statistical quality control uses sampling techniques and mathematical analysis to ensure that during design, manufacturing, and servicing, work is carried out and material used within the specified limits required to produce the desired standards of quality, performance, and reliability.
  • The aim is to minimize defects, not only for the practical reason that defects lose business but also because, ethically, no self-respecting company deserves to survive on the sale of sub-standard products or the delivery of inferior services.