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Control Chart

graph that establishes the control limits of a process

Purpose of a control chart

establish control limits of a process and monitor the process to see when it is out of control

Assignable variation vs Natural Variation

Assignable: due to definite causes, identifiable and correctable, process is out of control, source is man, material, machine, method


Natural: hard to id, process is in control, built in variability, source is natural events cant control

Six Sigma

measure of how much a process deviates from perfection



Steps of Six Sigma (DMAIC)

Define, Measure, Analyze, Interpret, Control