All Features
Donald J. Wheeler
Who could ever be against having good measurements? Good measurements are like apple pie and motherhood. Since we all want good measurements, it sounds reasonable when people are told to check out the quality of their measurement system before doing an experiment or putting their data on a process…
Cathy Hayat
Air travel has long been considered the safest form of transportation. Statistically speaking, the average American is safer in an airplane than an automobile. Though this is reassuring, the industry is relentlessly pursuing ways to improve air travel safety. One such improvement is the continued…
Mike Richman
World Metrology Week is a good time to think about how the science of test and measurement affects our lives. From reducing the time and cost of large-volume manufacturing and assembly to helping ensure the safety and reliability of aircraft, automobiles, and sea vessels, portable coordinate…
Knowledge at Wharton
It used to be that restaurant goers who were impressed by a particularly attentive waiter or waitress could praise that person to the manager or leave a generous tip. This kind of transaction is still available in many places of business, but increasingly the feedback loop has become more tangled…
Dave K. Banerjea and Gary Phillips
MSA, the often-used abbreviation for measurement system analysis, refers to the use of analysis to predict the statistical properties of measurement systems. In the realm of calibration management, this analysis can apply to gauges and other measurement equipment, calibration procedures, or other…
MIT News
According to a 2013 United Nations report 2 to 5 percent of all international trade involves counterfeit goods. These illicit products—which include electronics, automotive and aircraft parts, pharmaceuticals, and food—can pose safety risks and cost governments and private companies hundreds of…
Nick O’Donohoe
Wayward and capricious, the wind has long been used as a metaphor for constant change. Wind turbine engineers deal with that changeability every day, along with a host of other challenging factors.
Turbines must operate in desert sandstorms and corrosive saltwater. The ambient temperature at the…
NIST
JILA researchers have engineered a short, flexible, reusable probe for the atomic force microscope (AFM) that enables state-of-the-art precision and stability in picoscale force measurements. Shorter, softer, and more agile than standard and recently enhanced AFM probes, the JILA tips will benefit…
Dave K. Banerjea
Story update 4/24/2014: We bumped up the cost of accreditation based on comments that the original article was on the low side. We also added references to ILAC as well as additional accreditation bodies that operate in the United States (ACLASS, NVLAP, L.A.B.)
Getting calibration accreditation is…
TE Connectivity
For more than 50 years, the linear variable differential transformer (LVDT) position sensor has been a reliable tool for linear position feedback for laboratory, industrial, military, and aerospace applications. These sensors can provide linear displacement measurements ranging from microinches…
Bruno Scibilia
My main objective is to encourage greater use of statistical techniques in the service sector and present new ways to implement them.
In a previous blog, I presented an approach you can use to identify process steps that may be improved in the service sector (quartile analysis). here I’ll show…
Joel Smith
In part 1 and part 2 of this series, we looked at the numbers of parts, operators, and replicates used in a gauge repeatability and reproducibility (GR&R) study and how accurately we could estimate %Contribution based on the choice for each. In doing so, I wanted to provide you with valuable…
Dave K. Banerjea
Calibrating measurement and test equipment (M&TE) is expensive, but using equipment that is out of calibration can be even more costly. Faulty M&TE will produce suspect parts, and once you've discovered that your M&TE is the problem, you’ll have to screen the suspect parts and repair…
Joel Smith
In part one of this series, I looked at how adequate a sampling of 10 parts is for a gauge repeatability and reproducibility (GR&R) study and provided some advice based on the results.
Now I want to turn my attention to the other two factors in the standard gage (or gauge, if you prefer)…
Joel Smith
You take 10 parts and have three operators measure each part two times. This standard approach to a gauge (or gage, if you prefer) repeatability and reproducibility (GR&R) experiment is so common, so accepted, so ubiquitous that few people ever question whether it is effective.
Obviously one…
John Palmateer
This article estimates the uncertainty for measuring a tool tip using dual Leica T-Mac sensors set up on opposite sides of an NC machine head and measured with tracking interferometers at opposite ends of a machine bed. Performance testing compares the estimated and measured uncertainties and…
NIST
They spanned 140 degrees of latitude—from Canada to Chile—and varied widely in age and experience. But their goal was the same: To improve their metrological capabilities for the benefit of their home countries and the Western Hemisphere.
For five extremely full days during the last week of…
New River Kinematics
Metrologists are often faced with measurement processes that are repetitive and time-consuming. It’s not uncommon for a set of measurements to be taken repeatedly under different conditions and with different materials to maintain quality control. Afterward, the measurements must be formatted and…
Ron Hicks
Welcome to the winter edition of CMSC World. I want to touch on one of our biggest accomplishments of 2013—the Level-One Certification Program for Portable 3D Metrology. This program was requested and supported by many CMSC members. With your help and the tireless work of the Coordinate Metrology…
Creaform Inc.
Innovative technologies, mobility, and flexibility in measurement technology are playing a major role for more and more companies. In addition to fixed coordinate measuring machines (CMMs) or traditional measurement arms, optical systems are increasingly becoming established in measurement…
Mike Figliuolo
PowerPoint is the devil’s instrument, and when you use it, you risk becoming a musician in his demonic orchestra. All of us are required to give presentations in some form or fashion at various points in our careers. If you’d like to succeed in those efforts, there are three things you should never…
Dave K. Banerjea
Like so many other business software applications, calibration management software has evolved from simple beginnings as a digital index-card system that reminded operators when their instrument and tool calibrations were due. During the past 25 years, these systems have matured and are more…
Siemens PLM Software
Wood Stone Corp. captured American’s love for high-quality pizza and many other dishes when it started its stone-hearth cooking equipment business, eventually becoming world-renowned and the leading manufacturer in the industry. The company is especially popular for its wood-fired oven used by…
MIT News
MIT engineers have devised a way to measure the mass of particles with a resolution better than an attogram—one millionth of a trillionth of a gram. Weighing these tiny particles, including both synthetic nanoparticles and biological components of cells, could help researchers better understand…
FARO
Today’s new 3D metrology technology is making an impact on the design of championship Indy race cars. Andretti Autosport uses 3D metrology and laser scanning technology for applications in design, reverse engineering, and quality assurance. Advancement in, and simplification of, technologies such…
