Hi there,

I was wondering how to do the sensitivity analysis on ArcGis? I see there's a guide for the version 9.2 ( ArcGIS Desktop Help 9.2 - Performing sensitivity analysis ) but I don't understand much the steps because the explanation gives for granted that I made a ModelBuilder which is not my case. I made a suitability model for urban abandoned spaces that can be reused for projects of environmental remediation and now I want to check its reliability. As I understood, the best way to do this is the sensitivity analysis but I didn't find any document or web page (apart from the one above) that show how to perform that with ArcGis specifically. So my questions is: can someone kindly explain to a beginner how to perform the sensitivity analysis, please?

Otherwise, if any of you know any other approach to check the validity of a suitability model I'd really appreciate any suggestion or tip you may have

Thank you

Martina

You imply you have a model, albeit conceptual. Can you describe it?

In its simplest form, sensitivity analysis, in the gis sense of the term, could involve varying a variable/term in the model within a range to assess the change in outcomes. For instance, you model may have a factor 'X' which according to the literature is supposed to have an impact on 'Y'. You may find that varying the range that 'X' has within the model, you can view the change in 'Y' to see if this is correct. Quantitative models are best suited to this sort of analysis because simple cases of X affects Y don't look at the combined impact of other variables, some which may mitigate X's affect on Y.

So what do you have?

What is the form of the data? (raster, vector, a combination)

Software availability and version?

Familiarity with other non-gis software?

Familiarity with statistics? (both spatial and inferential)

anything else you can add