I have assessed three parameters for the product (i.e. A, B, C) and summed up all these to be one final value (i.e. A +B+ C= D)
Anyone know how i can do sensitivity analysis for this case?
i have attached the original data set.
Well there are a lot of possibilities. The easiest one is to use the ofat method: one factor at time. You vary your input variables one at time and you record the impact/variation on your output variable D. You can check out saltelli's books/articles on this topic. Be aware that the ofat method does not take into account combined effect of input variables.
Given that you have a simple linear additive model without interaction (with few values for each factor) you could use sigma-normalized derivatives or even a linear regression. See GSA the Primer by Saltelli et al. chapter 1 section 1.2.2.
http://www.andreasaltelli.eu/file/repository/A_Saltelli_Marco_Ratto_Terry_Andres_Francesca_Campolongo_Jessica_Cariboni_Debora_Gatelli_Michaela_Saisana_Stefano_Tarantola_Global_Sensitivity_Analysis_The_Primer_Wiley_Interscience_2008_.pdf
As Biagio mentioned, you could vary one parameter (say +/- 20 %) while keeping the others fixed and observe the changes in the product :)
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