William A. Levinson
The first part of this article illustrated the kinds of problems that can happen when data from non-normal processes are plotted on traditional control charts, and when traditional process capability...
William A. Levinson
A normal distribution is far more common in statistical textbooks than it is in real-world processes, and untold grief results from the unquestioning assumption that all manufacturing processes...
William A. Levinson
Last May I wrote in “Airline Companies Are Driving Customers Away” that the U.S. Military Academy allows cadets only four responses to questions as to whether a specific duty or responsibility was...
William A. Levinson
A Google search of the phrase “new customers only” reveals more than 3 million web pages. Radio ads for what look like exceptional deals often include the modifier, “new customers only;” existing...
William A. Levinson
Six Sigma has been credited with six- or even seven-figure returns in single projects, but it has not kept the manufacturing jobs of its principal exponents—Motorola, General Electric, and Maytag—in...
William A. Levinson
The airline industry’s complete disregard for service quality and total contempt for its customers has changed little since Quality Digest columnist H. James Harrington called out American Airlines...
William A. Levinson
Carbon dioxide emissions are symptomatic of energy consumption in manufacturing, especially in transportation. Therefore initiatives to reduce them often cut supply chain costs as well. However, the...
William A. Levinson
On December 29, 2006, passengers of American Airlines’ Flight 1348 were confined in a parked aircraft for eight hours. By this time, “The toilets on the American Airlines jet were...
William A. Levinson
“Then the Husaria broke into a wild g allop and the heavy mass of men and horses cascaded over the Turkish ranks, bowling over the first, slicing through the second… The Grand Vizir...
