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Capability and the Pooled Variance Statistic
Donald J. Wheeler
Performance indexes use the global standard deviation statistic to describe the past. Capability indexes use a within-subgroup measure of dispersion to characterize the process potential. However, some within-subgroup measures are better than others. This article will explain why you should not use the square root of the pooled variance statistic to compute either capability indexes or limits on…

Operations

5 Meeting Rules to Regain a Full Workday Each Week

Most leaders you meet are losing almost a full workday every week to meetings that go nowhere. Same people. Same topics. Same problems. No real movement.

You’ve seen it in boardrooms and job trailers: different settings, but the same pattern. The problem isn’t meetings; it’s that…

Robots Spare Warehouse Workers the Heavy Lifting

There are some jobs human bodies just weren’t meant to do. Unloading trucks and shipping containers is a repetitive, grueling task—and a big reason warehouse injury rates are more than twice the national average.

Pickle Robot Co. wants its machines to do the heavy lifting. The…

Do You Really Need Training?

Something goes sideways at work—missed deadlines, bad customer feedback, you name it—and the first suggestion is, “We need training!” Sound familiar? It’s like reaching for a Band-Aid when what you really need is a lifestyle change. Training can be powerful, but it shouldn’t be your knee-jerk…

Science-Backed Standards Keep You Safer in the Skies

If you’ve flown in the U.S. in recent years, you’re probably familiar with the airport security experience of entering a booth, raising your hands above your head, and having a machine check your body. That machine is called a millimeter wave scanner.

I’ve done this many times and…

Artec Leo and Spider II Aid Lessons in London

Traditional styles of lecturing and imparting information can be ineffective in terms of student engagement and triggering deeper learning. This is especially challenging in certain subjects that are difficult to teach in a classroom anyway, and for those who process information differently.…

One Less Risk

Increasingly, inspectors for the U.S. Food and Drug Administration (FDA) will evaluate your CMMS provider’s security controls—not just your internal procedures. In a cloud-hosted GxP environment, data doesn’t stop at your firewall; your vendor’s security posture becomes part of your compliance…

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