Hi, this requires a reformulation using binary variables, personally I can’t think of an easier way.
Using LOGMIP for reformulations seems to be a good option if you don’t know how to them on your own. Let me know if you need any further help. Something along the lines of:
0 wrote:
Hi again,
I tried to implent what you said, but without sucess…
What was your main idea for the constraints? I assume that all warehouses are available…
Quinta-feira, 13 de Fevereiro de 2014 14:52:50 UTC, Claudio Delpino escreveu:
Hi ASaLu,
What about implementing two different “warehouses” sets (preferential
and complementary warehouses) and separating the flows into two
different variables ? From there, the way to write the constraints
would depend of what is the way you have to signal that a warehouse is
available (i.e. do you use a binary variable or force a zero flow ?).
Regards
Claudio
On Wed, Feb 12, 2014 at 1:16 PM, ASaLu wrote:
Hi,
I’m building a model of optimization logistic flows.
I have several warehouses that will supply the factories. However I want to
make a restriction requiring that the first factories thou be supplied by
certain warehouses and only if these warehouse are not available is that the
factories are supplied by other warehouse.
I basically want to implement a hierarchy of preferences among the
warehouses. Anyone have ideas on how I can implement this?
–
“gamsworld” group.
To unsubscribe from this group and stop receiving emails from it, send an
email to gamsworld+...@googlegroups.com.
To post to this group, send email to gams...@googlegroups.com.
Visit this group at http://groups.google.com/group/gamsworld.
For more options, visit https://groups.google.com/groups/opt_out.
To unsubscribe from this group and stop receiving emails from it, send an email to gamsworld+unsubscribe@googlegroups.com.
To post to this group, send email to gamsworld@googlegroups.com.
Visit this group at http://groups.google.com/group/gamsworld.
For more options, visit https://groups.google.com/d/optout.