Ventana software support forum

Thanks. For the benefit of others, I found this useful when I went through it last year: https://www.youtube.com/watch?v=6pvJhKA0BmU In this case, part of the model is discrete (I also have another post about the same model; I thought the two topics were not related:)). I do need the 7 patients (or ...

Noted, thanks. The problem doesn't change when I see results every step, though. The inflow, stock, and outflow don't tally. What I am trying to do is model inflow as a function of patients transferred to community hospital from acute hospital, constraining inflow to be an integer. Outflow is calcul...

Thank you. This is very useful. In this round of modelling, I will implement the first option you describe: transfers are based on lambda*TIME STEP and stock of patients is integral of transfers/TIME STEP. (BTW I do get fractional stocks, which would have been a bit problematic while doing validatio...

I attach my WIP model, data file (synthetic data), and a results file. In the "CH" view, top right, the stock "CH Patients" has only one inflow, "CH Admissions by case mix and age group", and one outflow, "CH Discharges". As shown in the results file, for the ...

Thank you! Based on your pointers, I did something similar. I used RANDOM POISSON, with lambda set equal to an expected (fractional) value based on the transfer probability. The results are sentitive to the maximum value, which I am scaling to match actual data. This is *very* useful -- we have cont...

Thanks for the pointers. I attach the data file, with synthetic values. The CH transfers have to be linked to AH patients admissions. Intuitively, AH flows can be continuous because volumes are large, but CH flows cannot. This is a really early version. I do plan to use SDM-Doc after I have a first ...

I attach a first-cut model of Acute Hospital (AH) and Community Hospital (CH) utilisation. The unit of time is a day in this model. Since ~4% of AH patients transfer to CHs, modelling the flows by expressing them in the form that I have in the model does not produce any CH transfers. I was consideri...

Yes, thanks!

I attach a model that I have just started working on and the spreadsheet for inputs. I am using GET XLS CONSTANTS. I can read from the "1. Pop" tab of the spreadsheet but not from the "2. AH" tab. I get the error "Failed to connect to Excel...", for example in the varia...

Hi JJ,

Thanks for sharing your advice. True, looking that far ahead is challenging.

Best regards,
Ashish

Thank you. That works fine.

I have a working model which uses Tabbed Arrays. I've pasted an example below. I would like to revise the model to read data from an Excel file instead. The variable being defined does not vary with time; it depends on two subscript variables, "Age" and "Gender". I tried using GE...

Hello, My colleagues and I are defining a long-term general hospital capacity planning model. It will have a time horizon of about 70 years, and will essentially model population ageing and its impact on needs for services in different hospital sub-systems (emergency department, inpatient, outpatien...

I just opened the SVG file by double clicking on it, and it opened in a browser, where the top and bottom were truncated (in both Chrome and Edge). It does work with Inkscape.

Thanks.

Thanks. Which mail should I write to?

The new version does solve the problem of missing arrowheads in the loop. However, it wasn't clear to me how one can control the zoom get an svg file that shows the complete picture. The solution I am using now is as follows: - Add blank text boxes on the top right and bottom left, leaving gaps betw...

Thank you.

Following up on this, is there a way to get the print in a single PDF page? That would also help to present the CLD stage-by-stage.

Hi, I would like to build up my CLD in stages to show it in a presentation and in document. Using View->Export as SVG gives me files in which the loop arrowheads are missing (please see attachment, R1, for example). When I print to pdf, the CLD is spread across multiple (two) pages -- I don't see an...

Thank you! I realise now it is much easier to just hide elements. Strangely, setting the zoom to a fixed % does not work.

I realise this is a basic question -- I did look in help and search the forum, but I'm probably missing something obvious. I'm using Vensim DSS 8.0.9. I need to present a CLD loop by loop, inserting snips into a presentation. I would like to take the final CLD and delete some variables and links, so...

Thank you for the reply. Pardon my ignorance -- may I know how to email the Administrator?

I have a large number of tabbed arrays and other definitions that are much easier to copy-paste in the View -> As Text mode rather than in Sketch mode. Making the changes in the text editor has worked well most of the time, but quite often I get a message "Formatting..." (see attachment). ...

Thank you for those helpful replies. I am able to get the model to work.

Hi, I am working on a model of a hospital Emergency Department (ED). The number of patients in the ED is given by Patients in ED[Priority]= INTEG ( Transportation rate to ED[Priority]+"Walk-in and other non-995 cases"-ED Treatment Rate [Priority], 5000) Units: Case ************************...