A Critical Introduction. Quality A Critical Introduction continues to provide a complete knowledge platform for all those wishing to study the development of the theory and practice of quality management. Building upon previous editions unique critical perspective on quality, this edition includes new insights on the growing popularity in practice of practical, money-saving frameworks like Lean and Six Sigma. In addition, this version includes new EFQM Excellence Model updates and a new section on ISO90012015, as well as an examination of the value of the ISO standards and why they are adopted by organisations.