  # Basic Terms

This is X-Bar. It tells us the Average of a group of numbers (in this case average height). X-Bar is the middle of the curve where we have the largest percentage of men.

s = sigma = Standard Deviation

s is the Greek letter Sigma. It is the distance from the center of the curve to the point where the curve stops curving downward and starts curving outward. We�re interested in points at 1, 2 and 3 Standard Deviations from the Mean (the center).

If we measure 1 Standard Deviation on each side of the center of the curve , 68% of the Area will be between the lines drawn through these points.

The Human Proportions table tells us the Standard Deviation (s - dispersion) of men�s heights is 0.07 meters, so by simple addition and subtraction we know that 68% of the men are between 1.73 and 1.87 meters.

1.8 + 0.07 = 1.87

1.8 - 0.07 = 1.73 The. Deming PDCA Cycle QMS Implementation FMEA Information APQP Information Auditing Information 8-D Problem Solving Statistics Error Proofing (Poka Yoke) Brainstorming Identifying Waste Pull Systems Lead Time Reduction Planned Maintenance Quick Setup Discovering Change Process Capability - Cp vs. Cpk Histogram. Animation Process Loop Animation Taguchi Loss Function Fishbone / Cause and Effects Animation