Statistical Process Control (SPC)






A method of measuring and controlling the quality through constant monitoring of manufacturing process is called as Statistical Process Control (SPC). Quality data is collected in the form of process or product measurements, readings from different machines or instrumentations. This data is collected and used to evaluate, monitor and control processes.
SPC is considered as an effective method to drive constant improvement. Through proper monitoring and controlling processes, it is possible to assure that operations take place in its fullest potential. One of the most comprehensive and considered to be the most valuable resources of information regarding SPC is the manual published by AIAG – the Automotive Industry Action Group.
Manufacturing companies are facing an ever-growing competition nowadays and at the same time the cost of raw materials are rising at an unbelievable rate. These factors cannot be controlled by companies and therefore they must concentrate on controlling their processes.
Companies must strive to improve their quality, efficiency and cost reduction on a continuous basis. Many companies still depend on inspection to detect quality issues after production. SPC process is implemented to move a company from detection based to prevention based quality controls through performance monitoring to determine recent trends or changes to prevent scrap.

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