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Alliance Calibration

Measurement Uncertainty: Dirt Measures

Posted by Kevin Radzik on Sep 19, 2016 6:01:00 AM

Dirt Measures

In our calibration lab we have a saying, dirt measures. This actually means a lot more than just cleaning dimensional gages. It speaks to the fact that sources of measurement uncertainty are everywhere. In metrology speak we call them “contributors” to measurement uncertainty. These contributors are everywhere. We try to minimize their impact on the measurements we perform, but in order to do that we must identify them and then compute their magnitude. For this, blog we will skip the math and focus on identifying sources of measurement uncertainty.


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Topics: Measurement Uncertainty

Measurement Uncertainty: What's that number on my Certificate?

Posted by Kevin Radzik on Sep 6, 2016 9:27:56 AM

What’s that Number on My Certificate?

Measurement Uncertainty, you know it’s there. It’s that plus/minus number on your calibration certificate. You just received your prized possession from your calibration lab and you’ve looked over the whole certificate. All of it except that one number, or maybe you look at that number and wonder why it is different this year from last. Maybe, its larger than it was last year. Does this mean they are less certain about my calibration than they were last year?

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Topics: Measurement Uncertainty

TUR: What is it?

Posted by Kevin Radzik on Aug 29, 2016 11:04:20 AM

TAR, TUR, CMC, and TLAs

In the world of metrology, the three letter acronyms (TLAs) TAR, TUR, and CMC are routinely bantered about like exam scores. Bigger TARs and TURs with smaller CMCs led to the “Scope Wars” of the 90s and early 2000s.

For the quality professional however, all these TLAs have just made the world of metrology more confusing. The calibration world had just gotten past the NIST numbers argument when people started trying to compare scopes of accreditation with TAR/TUR requirements.

As early as the 1930s the “Gage Maker’s Rule of Ten” was regularly understood to be good measurement practice. The basic concept was that the tool used to make a measurement should be ten times as accurate as that object being measured. This was later codified in the 1960 version of the military standard MIL-C-45662. Oddly enough this statement was removed two years later in the 1962 version MIL-C-45662A.

 

TAR

TUR

CMC

Test Accuracy Ratio. First officially recommended in MIL-STD-120. Carried through various military specifications until ANSI/NCSL Z540.1

Test Uncertainty Ratio. First codified in MIL-HDBK-1839A and continued in ANSI/NCSL Z540.3

Calibration Measurement Capability. Formerly “BMC” Best measurement Capability.

First codified in ISO Guide 25.


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Topics: Standards and Compliance

FDA 483 Letters: 2nd Quarter 2016 Update

Posted by Phil Wiseman on Aug 9, 2016 3:16:39 PM

You've got Mail!

Well, you really don't want to get this letter from the FDA. The title of the web page says it all:

Inspections, Compliance, Enforcement, and Criminal Investigations.

FDA 483 letters are public records and can be viewed by anyone.

We have reviewed the 2nd quarter 2016 FDA 483 letters issued and see some trends in calibration that you should avoid.

Issuing offices include New York, Baltimore, Kansas City, Dallas, Philadelphia, New jers and, Seattle.

While public records, letters were redacted to remove company names and processes.

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Topics: Standards and Compliance

How Do I Know If My Lab is Capable?

Posted by Phil Wiseman on Jul 28, 2016 3:20:09 PM

Select an ISO 17025 accredited Lab and leave it at that.

This is the approach taken by many consumers of calibration services.

Continue reading to learn why this is not the best approach in selecting calibration services.

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Topics: Standards and Compliance

Pigs get Fat. Hogs get Slaughtered. The need for transparency in Business today.

Posted by Phil Wiseman on May 31, 2016 12:57:26 PM

Mark Cuban, owner of the Dallas Mavericks was recently quoted by ESPN -"I think the NFL is 10 years away from an implosion."  "I'm just telling you: Pigs get fat, hogs get slaughtered. ."

"Just watch. Pigs get fat, hogs get slaughtered. When you try to take it too far, people turn the other way. I'm just telling you, when you've got a good thing and you get greedy, it always, always, always, always, always turns on you. That's rule No. 1 of business."

429 companies on the 1955 Fortune 500 list are no longer on that list.

Have you heard of Netflix?

Rhetorical question.

You think Blockbuster Video should have purchased them when they had the chance?

Blockbuster who?

Want a more extensive list?

Visit 10 businesses that failed to adapt.

Name a company that has been dominant for last 25 years?

U.S. News & World Report in their article 10 Great Companies that Lost their Edge articulates several companies that remain significant and the many that have become irrelevant.



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FDA 483 Letters: 1st Quarter 2016 Update

Posted by Phil Wiseman on May 27, 2016 7:30:00 AM

You've got Mail!

Well, you really don't want to get this letter from the FDA. The title of the web page says it all:

Inspections, Compliance, Enforcement, and Criminal Investigations.

FDA 483 letters are public records and can be viewed by anyone.

We have reviewed the 1st quarter 2016 FDA 483 letters issued and see some trends in calibration that you should avoid. While public records, letters were redacted to remove company names and processes.

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Topics: Standards and Compliance

20 hours or 10,000 hours: What does it take to become a Subject Matter Expert.

Posted by Phil Wiseman on May 23, 2016 10:19:03 AM

In the past 3 years I have achieved 6 professional certifications. That is more than I accomplished in the previous 10 years. Being the curious person that I am, I began to wonder what does it really take to be an expert?

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Topics: General Interest Geek Stuff

Trust: Does it still exist?

Posted by Phil Wiseman on May 5, 2016 8:45:07 AM

There have been some major recalls in the news of late. Google recalls and you will get 117,000,000 results in under 0.32 seconds.

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Topics: Standards and Compliance

FSMA(Food Safety Modernization Act) and Calibration

Posted by Phil Wiseman on Mar 28, 2016 9:00:00 AM

 

From the FDA-
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Topics: Standards and Compliance

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Our goal is to provide information regarding calibration and its impact on your quality system.

In addition, we are the Geeks & Freaks of Calibration so we also post about Science for the nerd in all of us.

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