model ModelName

uses $"$mmxprs$"$

declarations

weeks $=1.\mathrm{.}10$

worker $=1.\mathrm{.}90$

HClassic : array$($weeks$)$ of real

HTouch : array$($weeks$)$ of real

BClassic : array$($weeks$)$ of real

BTouch : array$($weeks$)$ of real

Pslow : array$($weeks$)$ of real

Pfast : array$($weeks$)$ of real

Ct : array$($weeks$)$ of real

DClassic : array$($weeks$)$ of real

DTouch : array$($weeks$)$ of real

IlevelC : array$($weeks$)$ of mpvar

IlevelT : array$($weeks$)$ of mpvar

IonhandC : array$($weeks$)$ of mpvar

IonhandT : array$($weeks$)$ of mpvar

BackorderC : array$($weeks$)$ of mpvar

BackorderT : array$($weeks$)$ of mpvar

ProductionC : array$($weeks$)$ of mpvar

ProductionT : array$($weeks$)$ of mpvar

Overtime : array$($weeks$,$worker$)$ of mpvar

Qfast : array$($weeks$)$ of mpvar

Qslow : array$($weeks$)$ of mpvar

Stock : array$($weeks$)$ of mpvar

obj:linctr

end$-$declarations

HClassic :: $[0\mathrm{.}25,0\mathrm{.}25,0\mathrm{.}25,0\mathrm{.}25,0\mathrm{.}25,0\mathrm{.}25,0\mathrm{.}25,0\mathrm{.}25,0\mathrm{.}25,50]$

HTouch :: $[0\mathrm{.}35,0\mathrm{.}35,0\mathrm{.}35,0\mathrm{.}35,0\mathrm{.}35,0\mathrm{.}35,0\mathrm{.}35,0\mathrm{.}35,0\mathrm{.}35,120]$

BClassic :: $[0\mathrm{.}50,0\mathrm{.}50,0\mathrm{.}50,0\mathrm{.}50,0\mathrm{.}50,0\mathrm{.}50,0\mathrm{.}50,0\mathrm{.}50,0\mathrm{.}50,40]$

BTouch :: $[0\mathrm{.}70,0\mathrm{.}70,0\mathrm{.}70,0\mathrm{.}70,0\mathrm{.}70,0\mathrm{.}70,0\mathrm{.}70,0\mathrm{.}70,0\mathrm{.}70,100]$

Pslow :: $[24,24,24,24,18,18,18,18,18,18]$

Pfast :: $[36,36,36,36,36,36,36,36,36,36]$

Ct :: $[2700,2700,2700,2700,2700,2700,2700,2700,2700,2700]$

DClassic :: $[28224,28597,29356,29591,30383,30934,31086,31410,31793,32257]$

DTouch :: $[12053,11941,12235,12270,12326,12389,12466,12536,12620,12732]$

$!$IlevelC in week$0=1900$

ProductionC$(1)=25000$

IlevelC$(1)=1900+$ ProductionC$(1)-$ DClassic$(1)$

forall$($t in $2.\mathrm{.}10)$ IlevelC$($t$)=$ IlevelC$($t$-1)+$ ProductionC$($t$)-$ DClassic$($t$)$

$!$IlevelT in week$0=1300$

ProductionT$(1)=15000$

IlevelT$(1)=1300+$ ProductionT$(1)-$ DTouch$(1)$

forall$($t in $2.\mathrm{.}10)$ IlevelT$($t$)=$ IlevelT$($t$-1)+$ ProductionT$($t$)-$ DTouch$($t$)$

forall$($t in weeks$)$ IlevelC$($t$)=$ IonhandC$($t$)+$ BackorderC$($t$)$

forall$($t in weeks$)$ IlevelT$($t$)=$ IonhandT$($t$)+$ BackorderT$($t$)$

forall$($t in weeks$)4*$ProductionC$($t$)+8*$ProductionT$($t$)<=90*$Ct$($t$)+$ sum$($n in worker$)$Overtime$($t$,$n$)$

$!$Stock$(0)=2000$

$!$Qslow$(0)=40000$

$!$Qslow$(-1)=40000$

Stock$(1)=2000+$ Qfast$(1)+40000-$ ProductionC$(1)-$ ProductionT$(1)$

Stock$(2)=$ Stock$(1)+$ Qfast$(2)+40000-$ ProductionC$(2)-$ ProductionT$(2)$

forall$($t in $3.\mathrm{.}10)$ Stock$($t$)=$ Stock$($t$-1)+$ Qfast$($t$)+$ Qslow$($t$-2)-$ ProductionC$($t$)-$ ProductionT$($t$)$

forall$($t in weeks, n in worker$)$ Overtime$($t$,$n$)<=300$

forall$($t in weeks$)$ Qslow$($t$)<=40000$

obj:$=$sum$($t in weeks$)$IonhandC$($t$)*$HClassic$($t$)+$ sum$($t in weeks$)$ IonhandT$($t$)*$HTouch$($t$)+$

sum$($t in weeks$)$ BackorderC$($t$)*$BClassic$($t$)+$ sum$($t in weeks$)$ BackorderT$($t$)*$BTouch$($t$)+$

sum$($t in weeks$)(0\mathrm{.}3875*$sum$($n in worker$)$ Overtime$($t$,$n$))+$ sum$($t in weeks$)$ Qfast$($t$)*$Pfast$($t$)+$

sum$($t in weeks$)$ Stock$($t$)*0\mathrm{.}20+$ sum$($t in weeks$)$ Qslow$($t$)*$Pslow$($t$)$

minimize$($obj$)$

writeln$("$Begin running model"$)$

writeln$("$Optimal Value is: $",$ getsol$($obj$))$

forall$($t in weeks$)$

writeln$("$ProductionC$(",$t$,")=",$getsol$($ProductionC$($t$)))$

forall$($t in weeks$)$

writeln$("$ProductionT$(",$t$,")=",$getsol$($ProductionT$($t$)))$

forall$($t in weeks$)$

writeln$("$IlevelC$(",$t$,")=",$getsol$($IlevelC$($t$)))$

forall$($t in weeks$)$

writeln$("$IlevelT$(",$t$,")=",$getsol$($IlevelT$($t$)))$

forall$($t in weeks$)$

writeln$("$IonhandC$(",$t$,")=",$getsol$($IonhandC$($t$)))$

forall$($t in weeks$)$

writeln$("$IonhandT$(",$t$,")=",$getsol$($IonhandT$($t$)))$

forall$($t in weeks$)$

writeln$("$BackorderC$(",$t$,")=",$getsol$($BackorderC$($t$)))$

forall$($t in weeks$)$

writeln$("$BackorderC$(",$t$,")=",$getsol$($BackorderT$($t$)))$

forall$($t in weeks$)$

writeln$("$Stock$(",$t$,")=",$getsol$($Stock$($t$)))$

forall$($t in weeks$)$

writeln$("$Qfast$(",$t$,")=",$getsol$($Qfast$($t$)))$

forall$($t in weeks$)$

writeln$("$Qslow$(",$t$,")=",$getsol$($Qslow$($t$)))$

writeln$("$End running model"$)$

end$-$model

Why this Xpress code does not working. It gives $0$ for all values. Can you fix it$?$