19-09-2017, 11:33 AM
Statistical Process Control (SPC) is a quality control method that uses statistical methods to monitor and control a process. This helps ensure that the process works efficiently, producing more products that meet specifications with less waste (rework or scrap). SPC can be applied to any process in which the output of the "conforming product" (product meeting specifications) can be measured. The main tools used in the SPC include control charts, a focus on continuous improvement and the design of experiments. An example of a process where the SPC is applied are the manufacturing lines.
SPC was pioneered by Walter A. Shewhart at Bell Laboratories in the early 1920s. Shewhart developed the chart of control in 1924 and the concept of a state of statistical control. Statistical control is equivalent to the concept of interchangeability developed by the logical William Ernest Johnson also in 1924 in his book Logic, Part III: The Logical Foundations of Science. Together with an AT & T team that included Harold Dodge and Harry Romig worked to put sampling inspection on a rational statistical basis as well. Shewhart consulted with Colonel Leslie E. Simon in the application of control charts to the manufacture of ammunition at the Arsenal Picatinny Army in 1934. This successful application helped convince Army Ordnance to hire George Edwards from AT & T to consult about the use of statistical quality control between its divisions and contractors at the outbreak of World War II.
W. Edwards Deming invited Shewhart to speak at the Graduate School of the United States Department of Agriculture and served as editor of Shewhart's book, Statistical Methodology from the Point of View of Quality Control (1939), a result of that conference . Deming was an important architect of the quality control courses that trained the American industry in the new techniques during World War II. Graduates of these war courses formed a new professional society in 1945, the American Society for Quality Control, which elected Edwards as its first president. Deming travelled to Japan during the Allied occupation and met with the Union of Japanese Scientists and Engineers (JUSE) in an effort to introduce CPS methods into Japanese industry.
SPC was pioneered by Walter A. Shewhart at Bell Laboratories in the early 1920s. Shewhart developed the chart of control in 1924 and the concept of a state of statistical control. Statistical control is equivalent to the concept of interchangeability developed by the logical William Ernest Johnson also in 1924 in his book Logic, Part III: The Logical Foundations of Science. Together with an AT & T team that included Harold Dodge and Harry Romig worked to put sampling inspection on a rational statistical basis as well. Shewhart consulted with Colonel Leslie E. Simon in the application of control charts to the manufacture of ammunition at the Arsenal Picatinny Army in 1934. This successful application helped convince Army Ordnance to hire George Edwards from AT & T to consult about the use of statistical quality control between its divisions and contractors at the outbreak of World War II.
W. Edwards Deming invited Shewhart to speak at the Graduate School of the United States Department of Agriculture and served as editor of Shewhart's book, Statistical Methodology from the Point of View of Quality Control (1939), a result of that conference . Deming was an important architect of the quality control courses that trained the American industry in the new techniques during World War II. Graduates of these war courses formed a new professional society in 1945, the American Society for Quality Control, which elected Edwards as its first president. Deming travelled to Japan during the Allied occupation and met with the Union of Japanese Scientists and Engineers (JUSE) in an effort to introduce CPS methods into Japanese industry.