globals
[ product-count ;; the number of products
  company-count ;; the number of products
  max-quality   ;; the highest possible quality (currently)
  max-demand    ;; the highest possible demand (currently)
  demand-list   ;; the global markets demand for each product
]

breed [ companies company ]

companies-own
[ quality-list   ;; the quality level of each product manufactured
  production-list ;; the production level of each product this period
]

to setup
   clear-all
   clear-output
   simulate-demand
   satisfy-demand
   report-production
end   

to report-production
   ; repeat 10 [output-print "" ]
   output-print "--------------------"
   output-type "                  "
   repeat length format demand-list - length "DEMAND: " [output-type " " ]
   output-type "DEMAND: "
   output-print format demand-list

   output-type "(COMPANY ##)   "
   output-type "quality"
   repeat length format demand-list - length "quality" [output-type " " ]
   output-type "   "
   output-print "production"
   
   foreach sort companies
   [ ask ? 
     [ output-print (word self  (ifelse-value ( [who] of self < 10 ) [ " " ] [ "" ] ) 
                   "   " format quality-list
                   "   " format production-list
              )
     ]
   ]
   output-print "--------------------"
end
   
to simulate-demand
   set product-count products-in-market
   set company-count companies-in-market
   set max-quality 3
   set max-demand 5 ;; * 10 
   ;; randomly initialize the demand list
   set demand-list n-values product-count [ 10 * random ( max-demand + 1 ) ]
   ;; create companies
   
   create-companies company-count
   [ ;; randomly initialize product quality list
     set quality-list n-values product-count [ random ( max-quality + 1 ) ]
   ]
   
   ;; for display purposes only
   let c-size  (pi * (world-width )) / (company-count ) * cos (180 / (company-count ))
   let rad .5 * (world-width - c-size)
   ask companies
   [ home
     set shape "circle"
     set size c-size
     set label who
     set heading who * ( 360 / company-count)
     set color 15 + 10 * who
     jump rad
   ]
end

to satisfy-demand
   ;; clear the companies productionlist for this persiod
   ask companies
   [ set production-list n-values product-count [ 0 ]
   ]
   
   ;; create a sorted list of the companies for use later
   let sort-comp sort companies
   ;; now we have a list of stores [ s0 s1 s2 s3...]
   ;; in order by who number
   
   ;; create a list that just contains index numbers for demandlist
   let indexes n-values product-count [ ? ]
   
   ;; for each product in the demand list
   (foreach demand-list indexes
   [ ;; move the ?x placeholders into temp variables, for the sake of sanity
     let demand ?1 ;; demand for the product
     let index ?2  ;; index number of the product
     
     ;; proceed only if there is demand for this product
     if demand > 0
     [ 
       ;; proceed only if some company makes this item
       if any? companies with [ item index quality-list > 0 ]
       [ ;; find the company(ies) that produce the highest quality for this product
         let best-comps companies with-max [ item index quality-list ]
         
         ;; note: best-comps is an AGENTSET
         
         ;; store the number of best-comps
         let best-comp-count count best-comps
         
         ;; NOW we know who the manufactures will be,
         ;; we just have to divide the production evenly among them
         ;; if the demand can be evenly divided among the companies
         ;; this is trivial, but if it can't, then some
         ;; means of even distribution is needed (or not?)
         
         ;; calc the minimum amount each will produce
         let min-per-comp-qty floor (demand / best-comp-count)
         
         ;; calculate the remaining demand after the minimum is done
         let rem-demand demand - (min-per-comp-qty * best-comp-count)

         let prod-qty-list []
         ;; build a list of the production quantities
         ;; the first rem-demand items will be min-per-comp-qty + 1
         ;; the rest will be min-per-comp-qty
         ;; if there is no rem-demand, then all will naturally be min-per-comp-qty
         ;; in other words: map the index number to the production qty, 
         ;; based on the remainder compared to the index number
         set prod-qty-list map                           
                       [ min-per-comp-qty +              ;; the base amount, plus
                         ifelse-value ( ? < rem-demand ) ;; if the index number of this item 
                                                         ;; is within the quantity of the remainder to distribute
                         [ 1 ]                           ;; add 1
                         [ 0 ]                           ;; otherwise, add nothing
                       ]
                       n-values best-comp-count [ ? ]    ;; using a list of index numbers
             
         ;; now we have a list of quantities that the companies should produce
         ;; so we shuffle the list and let the companies take one of the production
         ;; quantities.
         (foreach ( sort best-comps ) prod-qty-list
         [ ;; put ?x in variables for sanity's sake
           let comp ?1
           let prod-qty ?2
           ;; remember index is the product index
           ask comp
           [ ;; replace the production quantity in product-list (a zero)
             ;; the the quantity from prod-list
             set production-list replace-item index production-list prod-qty
           ]
         ])
       ]
     ]
   ])
end   

to-report format [ input ]
   ifelse is-list? input
   [ 
     let cols 2
     let spaces "   "
     let line "["
     foreach input
     [ let i (word spaces ?)
       set i substring i ( length i - 2 ) ( length i )
       set line ( word line " " i )
     ]
     set line ( word line " ]" )
     report line
   ]
   [ report input ]
end
  
   
   
     
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GRAPHICS-WINDOW
10
146
185
342
16
16
5.0
1
20
1
1
1
0
1
1
1
-16
16
-16
16
0
1
1
ticks

CC-WINDOW
5
359
869
454
Command Center
0

BUTTON
10
100
180
133
NIL
setup
NIL
1
T
OBSERVER
NIL
NIL
NIL
NIL

SLIDER
10
10
180
43
companies-in-market
companies-in-market
3
13
13
1
1
NIL
HORIZONTAL

SLIDER
10
55
180
88
products-in-market
products-in-market
3
10
10
1
1
NIL
HORIZONTAL

OUTPUT
195
10
860
345

@#$#@#$#@
HOW TO USE

Click Setup.

WHAT IT DOES

The model will randomly generate the requested number of products and companies, with randomly generated product demands.
Then it assigns production levels using the criteria you mentioned.

HOW IT WORKS

The product demand list is just a global list.

The companies are each tutles of breed "companies".

The companies own a list, the quality list, that defines the quality level to which that company can produce the corresponding product.

The demand list is traversed. 

First, the maximum available manufacturing quality is found from among the companies.
Next, the set of companies that can produce at that quality level is found
Next, a set of production quantites are constructed to evenly divide demand among the set of companies previously formed
Next, the production quanties are distributed to the companies.

Finally, the resulting demand, quality, and production tables are printed.
@#$#@#$#@
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@#$#@#$#@
NetLogo 4.0beta1
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