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What is a Demerit Chart?
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The u chart is the optimum choice for analyzing
nonconformities over an area of opportunity. We count
the number of nonconformities in some defined region
of space, time or product. If our sample contains varying
areas of opportunity, then we can certainly use the
u chart.
When we are counting these nonconformities,
we may be counting different type of nonconformities,
some more important or critical than others. If we track
the type of nonconformity and count for each sample, we
could run a u chart on each type to determine if the more
important types are changing over time.
However, there is another method that
is often used that will help with this analysis: the D
Chart or Demerit Chart.
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| Benefits of a Web-based Enterprise
SPC Application |
With today's growing emphasis on
higher quality at a lower cost, manufacturers are looking
at creative ways to apply quality improvement technology.
With all the different SPC applications and various
platforms they run on, we're often asked by prospective
clients looking at our Statit e-QC application, "Why a web-based
system?"
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| Statit Software Acquired by ACS MIDAS+ |
written by Tom Simas
With apologies to Jerry Garcia and the Grateful Dead,
"...what a long, strange trip it's been!" From our humble
beginnings to our current reality: a strong and
prestigious customer base; a performance improvement
solution set that addresses enterprise dashboards, scorecards
and trend reporting throughout your organization; as
well as Physician Profile & Review, Root Cause Analysis
and much, much more, we have truly come a long,
long way. We have received hundreds of congratulatory
messages together with many questions. Most questions
could be summarized into a few. I will do my best
to answer each of these.
First, for those of you who may have missed the announcement,
please click here to learn more click here to
learn more.
Answers to your
questions...
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| Quality Q&A: Fine-tuning Control
Charts |
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Q: Are there alternatives
to using an X-Bar Chart?
A: X-bar R, X-bar S and
Individual charts are often the focus of control chart discussions.
In fact, they are frequently presented as the only options
for statistical process control charting. There are actually
other alternatives. This discussion will look at the benefits
of EWMA, exponentially weighted moving average, and moving
average or uniformly weighted moving average, UWMA, charts.
This article will discuss the data requirements and the
advantages of the Moving Average EWMA and UWMA charts.
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| Something You'd Like to See? |
Is there a topic you'd like us to discuss?
Have a process improvement question? If so, submit a topic request and
we'll see that your topic gets covered in an upcoming
edition of the Statit Bulletin.
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| Upcoming Webinar: Alternative
Control Charts |
In this month's complimentary
webinar, Guy March will look at a few alternative charts
that you might use in analyzing your processes. He'll
discuss the D and Q attribute charts as well as the EWMA
and Cusum variable charts. Each of these charts has properties
that can be helpful in the right circumstances.
With this discussion, you will understand:
- When and why these charts might be appropriate alternatives
- How to use them with Statit
- Some of the theory behind them
Wednesday, October 15
11am Pacific
12pm Mountain
1pm Central
2pm Eastern
Once you've registered, view a 10-minute
overview of Statit e-QC, Statit's continuous
quality improvement application that changes the way
your enterprise will approach the issues of ensuring
quality products and services.
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