SPC Executive Overview
This page provides links to two very short videos that provide a good introduction to SPC, with a focus on why it is a useful method.
These videos were provided freely on the internet, and are used as provided.
Short introduction to SPC (Statistical Process Control) by Gemba Academy. (~8 minutes)
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Really, really short introduction to SPC by PQ Systems (a provider of SPC software). (~3.5 minutes)