It sounds like you were given a set of individual cycle time measurements…and they want you to estimate the cycle time 80% of the time…Which is a rather vague request.
If they wanted you to tell them a value that 80% of the cycle time values are less than, then you would want to sort the data, and find the value that 80% are…[Read more]
Several aspects, largely financial:
1) According to research, it takes 10 to 20 times as much investment to gain a new customer as to retain an existing customer – it makes business sense to do your best to retain the existing customer base. Research also shows that the major cause of customer defections is loss of confidence in the…[Read more]
Oops!! I missed the sarcasm…I guess you just come across as such a nice guy, it didn’t occur to me that you were using sarcasm. My bad! :)
Eric 10 years, 3 months ago
You are correct…
Thomas Edison could not have been a TRIZ user. Edison passed away in 1931. TRIZ was invented in Russia, starting around 1946… shortly thereafter, Josef Stalin sent the inventor of TRIZ (Dr. Altschuller) to Siberia….
Dr. Altschuller’s research of patents, that led to the TRIZ approach, would very likely have…[Read more]
Ah…I finally was able to log in under my former username – Yea!
Samantha – I think MBBinWi was right about Concurrent Engineering – you can research it, but it likely won’t fit in well with the overall theme of your research paper.
Thanks for the challenging request.
1) First, do your best to clarify with the executives / management what you are really trying to optimize, and how to measure it. How can you measure “effectiveness”?
“Costs” sounds clear, but how will they know that you have optimized “costs”?
Mostly, the type of…[Read more]
Eric Maass replied to the topic Estimating Duration from Binary Data (momentary time series) in the forum General 11 years, 4 months ago
One way to handle this is to extract the time for each sequence of 1’s bookcased by zeros’ before and after. So, for the short set of data you provided, if I understand correctly, it seems that the equipment started working sometime between 9:03 and 9:06 AM, and stopped cutting material sometime between 9:15 AM and 9:18 AM.
One of the main intentions of Statistical Control Charts is to detect the difference between common cause variation and special cause varation. As part of that, the control limits and rules are intended to prevent over-reaction. In fact, the rules and control limits for many control charts have a relatively low alpha risk (the…[Read more]
Well, one alternative that was developed for group decision making is Accord’s Robust Decision software package:
Some or all of the simulation software programs you mentioned are for Discrete Event Simulation, which is a bit different from Monte Carlo Simulation.
1) Can you switch your frequency from monthly to weekly? Almost magically,
that could change your number of values from 7 to more than 25.
2) If you must stay monthly, can you go back further in time – so, about 2 years?
Mark,Remi is right. Alternatively, if you are more comfortable with
probability theory, you could estimate the yield for
each of the 6 characteristics as [1e6 – 600 ppm]*1e-
6 – .9994, and – like Remi said – if yo assume they
are independent, you could multiply them…or, since
each of the 6 characteristics have 600 ppm, you
Madhukar -I don’t know if this is the problem in your specific
case, but it is often difficult to get consistent
results with Multiple Linear Regression when the
“independent variables” are not independent – that
is, when they are correlated. Can you get the
matrix of correlation coefficients among the 6
“independent” input…[Read more]
Eugene,BTDT gave you good advice, but let me expand on it
to help you when you meet with the chemist.If your mixture contains a buffer,then the
dependence of the pH on the amount of chemicals like
acids or bases in the mixture will be very non-
linear. Please visit the url to see the graph below.…[Read more]
If you can get the sample size up a bit, I think you can optimize using Binary Logistic Regression analysis. You can think of it as moving from 0/1 that you’re seeing now, to analyzing the probability of having a defect, from 0 to 100%. I think you can stay with the CCD (Central Composite Design) for the response surface design, but the…[Read more]
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