export.xls
I'm wondering how I could go about including a fixed cost (defined by a binary variable) in my model. The fixed cost is $50000 in order to start producing a type of product, and I know that I will not be producing the Roasted Beans in this case because the profit contribution isn't enough to outweigh the initial fixed cost. I'm not sure how I could define this in Excel Solver though.
Would appreciate any advice, thank you!
Is this (Excel Programming / VBA / Macros) forum right to raise Solver questions? may be yes, as Solver is Add-in
You may try:
=SUMPRODUCT(B23:D23*(B7:D7>0))
inccluded in the cost side.
But notice that by doing so your problem is no longer a smooth one.
Last edited by Kaper; 02-07-2014 at 12:54 PM.
Best Regards,
Kaper
Hi,
Yeah it isn't doing it because this adds a fixed cost regardless of whether I am producing a type of product or not....
I would need to put something along the lines of x <= M.y as a decision variable, where x is quantity and y is the binary variable,but this instead wouldn't allow me to vary quantity produced.
Don't think so, because your produced quantities are in row 7 and inOriginally Posted by pykrete
=SUMPRODUCT(B23:D23*(B7:D7>0))
row 23 values are taken into account only when row7 value is >0 (only for these in production).
Yup, but because of how my objective function is set up, profits from a product that is not produced still go into the objective function
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Regards
Ford
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