Total Quality Management (TQM) is a philosophy and set of guiding principles for continuous improvement of processes within an organization. It focuses on customer satisfaction through an integrated system involving all employees. The key concepts are management commitment to quality, customer focus, quality at all levels, continuous process improvement, treating suppliers as partners, and performance measures. Important contributors to TQM include Shewhart, Deming, Juran, Feigenbaum, Ishikawa, Crosby, and Taguchi. TQM developed historically from skilled craftspeople to modern statistical quality control methods taught in Japan after World War II. Common obstacles to successful TQM implementation include lack of management commitment, inability to change culture, and inadequate customer focus.