Hi- We just transitioned from CB 5.5 to CB 7.3. We have kept CB 5.5 on some machines so we can compare the results that different versions of CB generate. One...
Hello Huybert, Thanks for your response. I was planning on using the inner loop (the variability part) for my individual patient data (so age, sex and clinical...
Hello, I'm trying to develop content requirements for a Crystal Ball class at a national conference next June. I'm on a planning committee for the National...
Jason, June is Las Vegas? That's too hot man. You need to get them to schedule in Jan-Feb to coincide with it being colder than a WTIABB if you know what I...
Hi Thea, If the patients are real patients of whom you know their characteristics (age, sex etc.), you actually don't have to use Monte Carlo simulation at ...
Hi Kevin, Thanks for the email. I agree with you about Vegas in June. I live in Alaska & that's the absolute worst time of year to travel outside of the...
Hallo Huybert, I see it is quite difficult to get the problem across in an unambiguous way. The patients are real in the sense that their risk factors are...
Hi Thea, That sounds like a rather depressing model ;-), although as an epidemiologist I've enjoyed developing similar modeling in the past myself. Your...
I have a question about the algorithm used to do a Batch Fit in CB version 7. It is supposed to be superior to the one used in CB version 5. If that were so...
Hi Marina, Great questions and probably a good moment to first explain distribution fitting a bit. Basically, Crystal Ball uses two general steps: 1. The...
Hi Marina, Just a quick correction to my previous email - only some of the MLE fitting has been improved from CB 5.5 to 7, but the calculations of the Goodness...
Hi All, We have just started using crysal ball in enhancing the planning for software projects. After working with it for some time I have got a hang of the...
Chinmay, As I understand your question, you appear to be seeking criteria for comparing various software design scenarios, is that correct? And if so, what...
Chinmay, I just read Kevin's article and applaud his suggestion that you download it. He details a set of criteria and a methodology that are compelling....
I'm a newbie of CB but this forum has helped me out a lot. Just wondering if anybody knows why the rank of correlation isn't equal when I do like this First...
Trying to find optimal sequence for events to be scheduled. Using EXCEL custom function to sample without replacement to get random order for 5 events. But...
Hi Harold, Any more information you can provide would be helpful, but I think that I understand you, and here's an idea that might help. Why not make your...
Hi Harold/Joe, That is indeed a quick solution Joe, and there are certainly many more different ways of doing this (if others have different or better...
To give a set of n items a distinct number from 1 to n: Assign to each of them a continuous random variate, e.g., =RAND(). Find the rank of its variate...
That would work to create a random order of events indeed, but wouldn't work when you want to find the optimal sequence using CB/OptQuest. Huybert From:...
Para aquellos que estan interesados como yo, en Colombia tiene programado un entrenamiento dirigido al análisis de riesgo en hidrocarburos. contactenme....
Use the correlation matrix tool. Crystal Ball give me the option of adjusting the coefficients to consistent values permanently or only for the current...
Hi all, Does anybody know how to show the forcast cell that is a new input for another forecast cell in sensitivity chart? For example Y = A+B+C+D ----> set Y...
I have about 12 data points on absolute forecast errors. The standard procedure to calculate Safety Stock is as follows: Mean Absolute Deviation (MAD) =...
Hi Nitie, Great question. There is a way to do this with using a (dynamic referenced) Custom Distribution within Crystal Ball. Instead of explaining it in...
Hi Ranga, To estimate the uncertainty about the mean, there are different methods of which here two common ones: 1. You assume that the data is normally...
Huybert, Thank you for the article. The article talks about an example but I could not find the example in the article. Is there a separate example attachment?...
Hi Ranga, Assuming that you would are referring to a "non-parametric bootstrap example", I just updated an example model (you should be getting an email soon,...
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