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By Quality Digest

In the world of nationwide retail, margins are tight, timing is essential, and inventory management will make or break a company’s success. Third-party logistics (3PL) providers work with major retailers and provide a broad range of fulfillment services. They make the complex process of delivering goods through the entire distribution process as efficient and cost-effective as possible.

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By Quality Digest

Regarding H. James Harrington’s video interview with Dirk Dusharme (“Profiles in Quality: Jim Harrington--Episode 2,” www.qualitydigest.com/inside/standards-video/profiles-quality-jim-harrington-episode-2.html): Harrington is highly recognized in the quality management society of China and has made significant contributions to Chinese quality management progress.

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By Davis Balestracci

Take a look at the control chart in figure 1. There are no observations outside the common-cause limits, but there are five special-cause flags:

Observation 5: Two out of three consecutive points greater than two standard deviations away from the mean

Observations 21 and 30-32: Four out of five consecutive points greater than one standard deviation away from the mean

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By Quality Digest


A Tell Tool technician using the Hawkeye borescope for part inspection

Davis Balestracci’s picture

By Davis Balestracci

This column is in honor of the first anniversary of my late father’s death. In his last days, Dad enjoyed watching golf, and I’d often join him. Watching the recent British Open, I thought I would apply some basic statistical principles to the final scores.

For example, 83 people made the cut, and the ANOVA of their individual round scores is shown in figure 1.

The two ANOM plots are shown in figures 2 and 3.

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By Dirk Dusharme @ Quality Digest

I always look forward to this time of year. Not in anticipation of prezzies under the tree, but for what changes 2009 will bring.

First, this issue brings you the last columns for two long-time columnists.

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By Donald J. Wheeler

The number of major hurricanes in the Atlantic since 1940 (as we considered in my February column, “First, Look at the Data”) are shown as a histogram in figure 1, below. Some analysts would begin their treatment of these data by considering whether they might be distributed according to a Poisson distribution.

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By Carey Wilson

In autumn 2006, customer demand was exceeding production capacity at Singer Sewing Machine facilities. To meet the capacity constraints, Don Fletcher, CEO of Singer’s parent company, SVP Worldwide, headquartered in Hamilton, Bermuda, decided to launch lean Six Sigma into all facilities around the world.

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By Quality Digest

Misadventures in Big-Box Land

Regarding “Big Boxes Beware” (“First Word,” Dirk Dusharme, November 2008): If you want to experience grocery-industry customer service at its finest, visit Wegmans. Their employees will load your groceries in your car for free, provide umbrellas for trips to your car in the rain for those who don’t have one, and personally take you to the items that you’re looking for when you can’t find something.

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By Dirk Dusharme @ Quality Digest

This, I swear, is a true story... mostly.

We own a washer and dryer combo unit made by a large home appliance manufacturer--let’s call them “Maytag.” The washer and dryer are in the company’s Neptune series. We’ve had them for about seven years and they’ve worked flawlessly, until recently.

About four months ago the washer started making an awful squealing noise when it went into the spin cycle. No problem, I thought. We have an extended warranty. I’ll just call the friendly Maytag repairman.