Optimization algorithm for zero-wait scheduling for multiproduct batch plants.
To run an optimization model these are the steps you need to follow:

1) Input Data

You must first click on the "Input Data" button
at the left side of your screen. A page will 
appear on the right side with two options for
you to choose from. 
	* Run an existing example. 
		If you choose this option you MUST 
		pick an example from the list.
	* Create an example of your own. 
		This is only possible for the model
		with one extractor. At this point you
		only  have to enter the number of 
		feeding streams.

When  you have chose your options, click  on the
"submit"   button at the end of the page. 
If you chose to run an example you can go to step 2.
If you choose to create you own example, a second
input page appears. You will be asked for flow rates.
compositions, and recovery ratios.

You have to fill in ALL of the information you
are asked for!! When you are finished click on
the "continue" button.

2) Run GAMS

Once you have inputted your data, you are ready
 to run GAMS. To do so, click  on the left side 
button  "Run Optimization". You should be able to 
see how the interations are taking place. 
When GAMS has finished, the phrase 'Normal
Completion' should appear on the very end
of your right side window. Please be patient 
and wait until you see that GAMS has finished,
otherwise you won't get your results.

3) View Results

When GAMS has finished the optimization and 
the 'Normal Completion' phrase appears, you 
are ready to see the  results the model has 
generated with your input data To see these 
results click on the "Summary of Results" 
button at the left side window. Here you can 
see the information on the model you have just
run, as well as the results the interface found.
You can take a look at the optimalextractor 
by clicking on the "View Extractor Button".

Make sure to click the "refresh" button on your
browser to make sure you get the latest results
generated.