React to an SPC Signal Without Over-Tampering
Use SPC thinking to separate special-cause signals from normal variation before changing an aerospace process.
Chart signal A bore point is beyond the control limit, but the part is still inside specification. The process may be unstable even before product is nonconforming. SPC lens Do not confuse tolerance with stability Control limits tell you when the process has changed; specifications tell you whether product meets the drawing. React to signals with containment and evidence, not reflex offsets. Tamper Offset every time a point looks uncomfortable. A corrected process and protected product. 01 Signal 02 Containment 03 Now you try Control vs spec One point is above the upper control limit; the part remains in tolerance.
Sign up free — one personalized lesson every day, matched to your role and goals.
Already have an account? Sign in