ENGINEERBOOKLET
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Core Fundamentals

The things that don't change. Stress and strain, material selection, process capability, bearings, bolted joints.

Playlist on YouTube
07Statistical Process Control (SPC) Explained: Signal or Noise? NewAn operator nudges the tool after each shaft that comes out big or small, and the shafts get worse. How to tell a real change in a process from its day-to-day wobble: common and special cause, the X bar and R chart, why control limits are not tolerances, how to read the signals, which chart fits which data, and why chasing a size widens the spread.10:09Oct 23, 2026