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A measurement systems analysis (MSA) is a thorough assessment of a measurement process,and typically includes a specially designed experiment that seeks to identify the components of variation in that measurement process.
Just as processes that produce a product may vary,the process of obtaining measurements and data may also have variation and produce incorrect results.A measurement systems analysis evaluates the test method, measuring instruments, and the entire process of obtaining measurements to ensure the integrity of data used for analysis (usually quality analysis) and to understand the implications of measurement error for decisions made about a product or process.MSA is an important element of Six Sigma methodology and of other quality management systems.
MSA analyzes the collection of equipment, operations, procedures, software and personnel that affects the assignment of a number to a measurement characteristic.
A measurement systems analysis considers the following:
- Selecting the correct measurement and approach
- Assessing the measuring device
- Assessing procedures and operators
- Assessing any measurement interactions
- Calculating the measurement uncertainty of individual measurement devices and/or measurement systems
Common tools and techniques of measurement systems analysis include: calibration studies, fixed effect ANOVA, components of variance, attribute gage study, gage R&R, ANOVA gage R&R, and destructive testing analysis.The tool selected is usually determined by characteristics of the measurement system itself.An introduction to MSA can be found in chapter 8 of Doug Montgomery's Quality Control book.[1]These tools and techniques are also described in the books by Donald Wheeler[2]and Kim Niles.[3]Advanced procedures for designing MSA studies can be found in Burdick et. al.[4]
Equipment: measuring instrument, calibration, fixturing.
- People: operators, training, education, skill, care.
- Process: test method, specification.
- Samples: materials, items to be tested (sometimes called 'parts'), sampling plan, sample preparation.
- Environment: temperature, humidity, conditioning, pre-conditioning.
- Management: training programs, metrology system, support of people, support of quality management system.
These can be plotted in a 'fishbone' Ishikawa diagram to help identify potential sources of measurement variation.
Goals[edit]
The goals of a MSA are:
- Quantification of measurement uncertainty, including the accuracy, precision including repeatability and reproducibility, the stability and linearity of these quantities over time and across the intended range of use of the measurement process.
- Development of improvement plans, when needed.
- Decision about whether a measurement process is adequate for a specific engineering/manufacturing application.
ASTM Procedures[edit]
The ASTM has several procedures for evaluating measurement systems and test methods, including:
- ASTM E2782 - Standard Guide for Measurement Systems Analysis
- ASTM D4356 - Standard Practice for Establishing Consistent Test Method Tolerances
- ASTM E691 - Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
- ASTM E1169 - Standard Guide for Conducting Ruggedness Tests
- ASTM E1488 - Standard Guide for Statistical Procedures to Use in Developing and Applying Test Methods
ASME Procedures[edit]
The American Society of Mechanical Engineers (ASME) has several procedures and reports targeted at task-specific uncertainty budgeting and methods for utilizing those uncertainty estimates when evaluating the measurand for compliance to specification. They are:
- B89.7.3.1 - 2001 Guidelines for Decision Rules: Considering Measurement Uncertainty Determining Conformance to Specifications
- B89.7.3.2 - 2007 Guidelines for the Evaluation of Dimensional Measurement Uncertainty (Technical Report)
- B89.7.3.3 - 2002 Guidelines for Assessing the Reliability of Dimensional Measurement Uncertainty Statements
AIAG Procedures[edit]
The Automotive Industry Action Group (AIAG),a non-profit association of automotive companies,has documented a recommended measurement systems analysis procedure in their MSA manual.[5]This book is part of a series of inter-related manuals the AIAG controls and publishes,including:
- The measurement systems analysis manual
- The failure mode and effects analysis (FMEA) and Control Plan manual
- The statistical process control (SPC) manual
- The production part approval process (PPAP) manual
Note that the AIAG's website has a list of 'errata sheets' for its publications.
See also[edit]
References[edit]
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- ^Montgomery, Douglas C. (2013). Introduction to Statistical Quality Control (7th ed.). John Wiley and Sons. ISBN978-1-118-14681-1.
- ^Wheeler, Donald (2006). EMP III: Evaluating the Measurement Process & Using Imperfect Data. SPC Press. ISBN978-0-945320-67-8.
- ^Niles, Kim (2002). Characterizing the Measurement Process in iSixSigma Insights Newsletter, Vol. 3, #42. ISSN1530-7603.
- ^Burdick, Richard K.; Borror, Connie M.; Montgomery, Douglas C. (2005). Design and Analysis of Gauge R&R Studies: Making Decisions with Confidence Intervals in Random and Mixed ANOVA Models. SIAM. ISBN978-0-898715-88-0.
- ^AIAG (2010). Measurement Systems Analysis, MSA (4th ed.). Automotive Industry Action Group. ISBN978-1-60-534211-5.
MSA
Historical notes on mainframe application software vendor Management Science America (MSA). Related subjects include:
These days, when one thinks of corporate culture in the tech industry, what comes to mind are probably:
- Internet juggernauts — Google, Facebook and their younger siblings.
- The cheapskates at Amazon.
- Brogrammers.
- Etc.
Most of that is at the internet companies, although there are exceptions — any kind of companies can have ping-pong tables, beanbag chairs, and a bunch of dogs* running around the office.
*I mean literal pooches, not bad products. WibiData used to even post headshots of the dogs on their employee page.
But there was a time, before the internet era, when similar things could be said of enterprise IT companies. The biggest fuss about culture was perhaps made among the more buttoned-down crowd, including IBM (most famously), MSA (the example that made me think of this subject), and EDS (who commissioned a Ken Follett book about themselves). They are all I have space for in this post. But there were also the beginnings of recognizable Silicon Valley start-up culture, and I hope to discuss that in the future.
The dignity crowd
I still chuckle when I see an IBMer in a company-issued polo shirt, because there was a time when IBM had a strict dress code of conservative suits and ties. Along with that went never drinking alcohol in a customer setting, in an era when boozy business meals were the norm. The point of all these rules, I think, was twofold. First, IBM wanted to be seen as a trusted, dignified adviser to customer organizations. Second, IBM generally wanted some kind of rules so that the behemoth corporation would be a team.
And IBM was more than a collection of people; it was an organization. Employees with 20+ year service might average one city-to-city move per year. (Hence the joke that IBM stood for I’ve Been Moved.) But whoever was involved with your account — if your systems stopped working, IBM would do whatever it took to get you back running fast. And a large fraction of IBM’s sales effort was spreading FUD (Fear, Uncertainty and Doubt) as to whether rival vendors would care for customers equally well.
EDS (Electronic Data Systems, founded by Ross Perot) fancied itself as a cross between IBM and the US military. Even computer operators had to be clean-shaven and wear jacket and tie. A large fraction of hires were military veterans,* and an extreme “Do it now! No excuses for failure will be accepted!” ethos flowed through the company. Read more
John Imlay passed away last week. Let me start by saying:
- John was a jolly huckster. Of the entrepreneurs I’ve known with manic amounts of sales energy, he’s the one I can least imagine saying or doing an unkind thing. Indeed, the breathless bit about John’s “kindheartedness” toward the end of this 2010 article doesn’t ring too false.*
- John wasn’t technically the founder of MSA, but he might as well have been. (Analogy: Steve Case at AOL.) When he got there, it was Management Science Atlanta, a failing hodgepodge of tiny businesses. He turned into Management Science America, a leading software company of its day, and the one that “should” have become what SAP is today.
- My 2006 post on MSA Memories has 90 comments, the vast majority of which are from former MSA employees who loved working there.
*Not as persuasive is the story about the missed chance to buy Microsoft in 1981. I knew a LOT of folks at MSA in the 1980s, and nobody ever mentioned that. Also, the story has an obviously wrong Microsoft fat (what city it was in).
John Imlay was a showman, best known for giving speeches with live animals or other dramatic visual aids, as per this short 1994 New York Times interview. But he was also a tireless, lead-from-the-front seller. An MSA salesman who booked John into an exhausting schedule of sales calls could expect a return visit from his CEO soon, because he was using Imlay’s time optimally. Indeed, I didn’t really know John all that well, probably for a couple of reasons:
- He was rarely around when I visited; he was much more likely to be out on the road selling.
- This was back in my stock analyst days, and I generally spent more time with detail-oriented folks, numbers- and product-oriented ones alike.
Categories: Cullinet, MSA | 2 Comments |
The commercial computing, software and services industries have existed for half a century or so each. It might be interesting to review how their pricing and delivery models have evolved over time.
1960s and 1970s
Modern IT is commonly dated from the introduction of the IBM 360 mainframe in 1964-5. But even before then, there was a growing industry in what we’d now call outsourced services, specifically in payroll processing; major players included Automatic Data Processing (ADP), the company that gave us Senator Frank Lautenberg, and a variety of banks. This was (and to this day remains) a comprehensive service, priced by unit of work (e.g., number of payroll checks cut).
IBM mainframes, which quickly came to dominate the market, were in the 1960s and 70s commonly rented. IBM software that ran on them was hence typically priced on a rental/subscription basis as well. The independent packaged software companies, however, often preferred to get paid up front,* and hence sold perpetual licenses to their software. Annual maintenance fees for the licensed software started in the range of 10% of the perpetual license or even less, but migrated up to today’s 20-22% range.
Categories: Analytics, Application software, ASK Computer Systems, Computer Associates, Computer services, Cullinet, EDS, IBM, MSA, Oracle | 8 Comments |
I recently wrote a long post on the premise that enterprise analytic applications are not like the other (operational) kind. That begs the question(s): What are operational enterprise applications like?
Historically, the essence of enterprise applications has been data management — they capture business information, then show it to you. User interfaces are typically straightforward in the UI technology of the era — forms, reports, menus, and the like. The hard part of building enterprise applications is getting the data structures right. That was all true in the 1970s; it’s all still true today.
Indeed, for many years, the essence of an application software acquisition was the database design. Maintenance streams were often unimportant; code would get thrown out and rewritten. But the application’s specific database structure would be adapted into an extension to the acquirer’s own.
Examples that come to mind from the pre-relational era include: Read more
Categories: Application software, Cullinet, McCormack & Dodge, MSA, Pre-relational era, SAP | 2 Comments |
The approach of April Fool’s Day has me thinking of software industry pranks and other hijinks. Most of what comes to mind is verbal jousting of various sorts that doesn’t really fit the theme. But there was one case in which ongoing business competition got pretty prankish: mainframe-era accounting software leaders MSA vs. McCormack & Dodge. Read more
Categories: Application software, Fun stuff, McCormack & Dodge, MSA | 8 Comments |
Computerworld got software industry history a bit wrong by implying that John Cullinane innovated packaged software (specifically, they said “packaged application”). Here’s what really happened, as I learned soon after becoming an analyst in the early 1980s:
- Most early packaged software companies were hybrids, offering both packaged products and professional services (including services unrelated to the packaged products).
- Applied Data Research, led by Martin “Marty” Goetz, is the clear innovator in third-party packaged software. Not only is ADR’s Autoflow the generally acknowledged first packaged software product from an independent company (“independent” as opposed to, say, IBM), but ADR was a leader in legal and political anti-trust action to gain market space to sell against IBM.
- If you use the term “application” narrowly — so that anything whose main function was to help manage IT shops and activities is “system software” rather than “application” — there’s no way Cullinane was an early leader. Think instead of American Software, MSA, McCormack & Dodge, or several specialists in regulated verticals such as banking and insurance. But if you use the term “application” loosely, ADR gets priority as noted above.
- The credit Cullinane usually gets for leading the way in software company success (e.g., first IPO of a product company) is absolutely justified.
Categories: Application software, Applied Data Research, Cullinet, IBM, McCormack & Dodge, MSA, Pre-relational era, System software | 7 Comments |
I was just writing about LinkedIn again, and was reminded that nobody ever answered the trivia question based on this post:
Who was the original fictitious Rob Carpenter?
MSA (Management Science America). This section got so long I’m breaking it out as a separate post just about MSA.
M & D (McCormack & Dodge). M & D was MSA’s archrival in mainframe financial software. They had various claims to product superiority, based on having “more CPAs on staff” than MSA and also on being first to market with realtime applications. However, M & D sold out early to Dun & Bradstreet, and lost its edge as key managers left.
M & D seems to have been a lively company. Many stories about drugs or sex emerged (I don’t actually recall any drugs-and-sex-combined stories, for whatever reasons). Key players included: Frank Dodge, a former schoolteacher who founded another not terribly successful apps company (The Dodge Group) afterwards; Jim McCormack, who happily retired from software into real estate, but sadly died a few years later; development chief John Landry, who’s been a prominent industry figure ever since, and sales/marketing chief Bob Weiler, ditto. Landry and Weiler went together to Distribution Management Systems, Cullinet (after it bought DMS), and Lotus, before going their separate ways.
M & D’s venture into manufacturing applications seemed later and more half-hearted than Comserv’s or Cullinet’s. But they eventually did wind up with a version of (and may even have bought control of) the Rath & Strong technology.
Cullinet. Cullinet was better known as a DBMS vendor. But in a precursor of what became the Oracle strategy, it pursued financial and manufacturing applications as well. The financial applications were originally licensed from M & D. The manufacturing apps were originally licensed from Rath & Strong, as were M & D’s.
One negative consequence was that the industry teamed up against Cullinet. For example, ADR in DBMS and MSA in apps formed a close marketing relationship. To general industry agreement at the time, I dubbed this the ABC (Anybody But Cullinet) strategy.
Cincom. DBMS vendor Cincom pursued a Cullinet-like apps strategy. Not many people cared.
J. D. Edwards. If I recall correctly, JDE’s main platform was the IBM System 38, the predecessor to the AS/400. Anyhow, JDE was a Denver-based financial software company. Its main claim to fame, other than the platform that it ran on, was a superb order entry system. Rob Kelley, referring to his days at Arthur Andersen, once told me that Andersen’s order entry system had had 45,000 lines of code, JDE’s had had 5,000 lines, and JDE’s had been better.
SAP. I’ve already written up what I recall about SAP in the 1980s.
This initial list leaves a lot of companies out, of course. Other than the MRP companies — ASK, NCA, XCS, and so on — the biggest omission may be Walker Interactive. But also missing are Global Software, Data Design, a whole lot of human resources specialists and so on.
Also missing are other vertical market groups, most notably in banking software, which is where general ledger products (the first major financial application) first succeeded in a big way.
I hope to get around to writing about these subjects before too long.
Categories: Application software, McCormack & Dodge, MSA, Pre-relational era, SAP | 5 Comments |
When I became a software analyst in 1981, MSA (Management Science America) was generally regarded as the leading cross-industry financial software vendor. Its CEO was the colorful John Imlay, best known for a variety of showman stunts, such as bringing animals to sales meetings. (He also was known as “the man who killed the keypunch” from his hardware days, when he took a sledgehammer on stage to a keypunch machine in a presentation introducing key-to-disk technology.) The president was Bill Graves, the most agile 300 poundish guy I’ve ever seen off of a football field, and still the only person at whose house I’ve held hands during the saying of Grace.
MSA software ran only on IBM mainframes. There were a limited number of modules. I specifically recall an ad campaign for the “Big Eight,” because they had eight modules, and the “Big Eight” were the public accounting firms in those days. The eight included payroll, human resources, and six financial modules, which were general ledger, accounts payable, accounts receivable, purchasing, fixed assets, and probably inventory. That’s all, versus the hundreds of modules successor companies have today.
MSA obviously modeled its “persona” on IBM. Indeed, the MSA logo consisted of the three letters in a font that consisted of thin parallel horizontal lines, exactly like IBM’s of that day did. Another major slogan was “People are the key,” with little key lapel pins given to five- and ten-year employees. Read more
Categories: Application software, McCormack & Dodge, MSA, Pre-relational era | 147 Comments |
Until the past couple of years, I didn’t have a lot of dealings with SAP. (That has now changed significantly.) But it seems that the things I do recall aren’t that widely known anymore.
I first heard of SAP in the 1980s. It was a smaller company than the then-leading mainframe application software vendors. Peter Zencke told me earlier this week that when he joined in 1983, the company had around 100 employees. From memory about MSA’s figures, I’d guess SAP’s revenue was somewhere in the $150-250,000 per employee range. Also from memory, I’d guess that MSA and M&D (McCormack & Dodge) were meaningfully bigger than SAP at that time. I also think that SAP combined financial and manufacturing applications earlier than the other mainframe vendors did, and hence probably got more revenue per client from a small number of clients. (MSA didn’t get into manufacturing apps until they bought Comserv, which if I recall correctly never broke the $20 million revenue mark on its own.)
SAP was almost unique among significant software vendors in being based outside the US, Software AG being the other obvious big example. There was no Business Objects then, of course. I don’t think that any of the UK companies that eventually made a modest impact — MicroFocus, LBMS, and much more recently Autonomy — were even active then. So it was pretty much off of people’s radar screens …
Indeed, at one point in the early 1990s I wrote to the effect of “Hey! There really are some important European software companies!” And spurred by that, my clients at Fidelity Investments invested in SAP. Too bad they were perennially stingy about compensation for good investment ideas …
Anyhow, the word on SAP from its competitors was that in the US at least, SAP focused tremendous sales effort on a small number of prospects, and in those accounts they were very hard to beat. These accounts seemed to be centered on the chemical and pharmaceutical industries, presumably because those industries were particularly strong in SAP’s home German market. Not coincidentally, SAP’s US operations were headquartered in Pennsylvania, near the New Jersey stronghold of those industries in the US. It’s natural to conjecture that SAP had superior functionality for process manufacturing industries, something that was pretty primitive in those days, but I don’t recall any direct mentions of this.
I learned more in the early 1990s when Jeremy Coote called up and introduced himself. He was the CFO of SAP’s US operations (he later went on to a big job at Siebel). It turned out that SAP had some contractual reason only to invest limited resources in the US. But that would change soon; one of the directors was coming over to run things in the US personally; and so on. Obviously, they lived up to that much more than I could possibly have envisioned at the time.
The story of how SAP’s rise dovetailed with the growth of the public accounting firms’ consulting practices is better known; I’ll leave the telling of that to another time.
Categories: Application software, MSA, Pre-relational era, SAP | 5 Comments |
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