![]() Then, the process is stabilized to eliminate causes of variation. First, the process and its specification limits are fully understood. These are “not in control,” and reducing this kind of variation is the key to creating more efficient operations. Special cause variations, which are not natural and are externally sourced.Common cause variations, which are considered to be naturally occurring and can be expected to happen within a process.There are two types of process variation: ![]() DOE is a method that allows people to investigate multiple causes of variation simultaneously, while control charts are a means to monitor an ongoing production process and identify variation. SPC is typically associated with two tools: control charts and Design of Experiments (DOE). Ultimately, it aids in decision-making to eliminate variations and reduce waste, ensuring that processes operate as efficiently as possible. SPC is a vital strategy used during Six Sigma to assess process control and monitor variations. Six Sigma, one of the major techniques of Lean manufacturing, aims to prevent process variation and make sure that a company has the ability to consistently and reliably produce products and services that are of high quality. It is a methodology that is widely used to continuously improve processes, and is a subset of Six Sigma. SPC stands for Statistical Process Control.
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