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NanjingUniversityofPostsandTelecommunications
LabReport
Title:AdvancedOperationalResearch
Instructor:
StudentID:
Name:
Score:
SchoolofManagement
FirstSemester2015-2016SchoolYear
4.MetropolitanMicrowaves,Inc.isplanningtoexpanditssalesoperationbyofferingotherelectronicappliances.Thecompanyhasidentifiedsevennewproductlinesitcancarry.Relevantinformationabouteachlinefollowsonthenextslide.
MetropolitanhasdecidedthattheyshouldnotstockprojectionTVsunlesstheystockeitherTV/VCRsorTVs.Also,theywillnotstockbothVCRsandDVDplayers,andtheywillstockvideogamesiftheystockTVs.Finally,thecompanywishestointroduceatleastthreenewproductlines.Ifthecompanyhas$45,000toinvestand420sq.ft.offloorspaceavailable,formulateanintegerlinearprogramforMetropolitantomaximizeitsoverallexpectedreturn.
Definethedecisionvariables:
ifprodrctline1isproduced,x1=1;ifnot,x1=0;
ifprodrctline2isproduced,x1=1;ifnot,x2=0;
ifprodrctline3isproduced,x1=1;ifnot,x3=0;
ifprodrctline4isproduced,x1=1;ifnot,x4=0;
ifprodrctline5isproduced,x1=1;ifnot,x5=0;
ifprodrctline6isproduced,x1=1;ifnot,x6=0;
ifprodrctline7isproduced,x1=1;ifnot,x7=0;
definetheobjectivefunction:
definetheconstraints:
thetotalamountofmoneyinvstedis$45,000:
thetotalfloorsquaravailableis420sq.ft.:
VCRsandDVDplayerscannotbebothstocked:
theyshouldnotstockprojectionTVsunlesstheystockeitherTV/VCRsorTVs:
theywillstockvideogamesiftheystockTVs:
thecompanywishestointroduceatleastthreenewproductlines:
Maximize[{0.081*6000x1+0.09*12000x2+0.11*20000x3+0.102*14000x4+0.101*15000x5+0.141*2000x6+0.132*32000x7,
6000x1+12000x2+20000x3+14000x4+15000x5+2000x6+32000x745000,
125x1+150x2+200x3+40x4+40x5+20x6+100x7420,
x4+x51,
x1+x2x3,
x2-x60,x1+x2+x3+x4+x5+x6+x73
x11||x10,
x21||x20,
x31||x30,
x41||x40,
x51||x50,
x61||x60,
x71||x70},
{x1,x2,x3,x4,x5,x6,x7}]
结果:{5304.,{x10.,x21.,x30.,x40.,x50.,x60.,x71.}}
5.HartManufacturingmakesthreeproducts.Eachproductgoesthroughthreemanufacturingdepartments,A,B,andC.Therequiredproductiondataaregiveninthetablebelow.(Alldataareforamonthlyproductionschedule.)
ProductionDepartment
Product1
Product2
Product3
Hoursavailable
A(hours/unit)
1.5
3
2
450
B(hours/unit)
2
1
2.5
350
C(hours/unit)
0.25
0.25
0.25
50
ProfitContributionsperUnit
$25
$28
$30
SetupCostsperproductionrun
$400
$550
$600
MaxProductionperproductionrun(Units)
175
150
140
FormulateanintegerlinearprogramforHartManufacturingtomaximizeitsoverallprofit.
Definethedecisionvariables:
x1:theamountofproduct1;
x2:theamountofproduct2;
x3:theamountofproduct3;
ifproduct1isproduced,y1=1;ifnot,y1=0;
ifproduct2isproduced,y1=1;ifnot,y1=0;
ifproduct3isproduced,y1=1;ifnot,y1=0;
Definetheobjectivefunction:
(1)HoursavailableinmanufacturingAis450:
1.5x1+3x2+2x3<=450;
(2)HoursavailableinmanufacturingBis350:
2x1+x2+2.5x3<=350;
(3)HoursavailableinmanufacturingCis50:
0.25x1+0.25x2+0.25x3<=50;
(4)themaxproductionofproduct1is175,sonomatterwhetherproduct1isproducedornot,itsproductionmustnotgetover175:
x1<=175y1;
(5)themaxproductionofproduct2is150,sonomatterwhetherproduct1isproducedornot,itsproductionmustnotgetover175:
x2<=150y2;
(6)themaxproductionofproduct3is140,sonomatterwhetherproduct1isproducedornot,itsproductionmustnotgetover175:
x2<=140y3;
(7)thevalueofx1,x2,x3shouldnotbenegative:
x1>=0,x2>=0,x3>=0;
Maximize[{25x1+28x2+30x3-400y1-550y2-600y3,
1.5x1+3x2+2x3450,
2x1+x2+2.5x3360,
0.25x1+0.25x2+0.25x350,
x1-175y10,
x2-150y20,
x3-140y30,
x10,x20,x30,
y11||y10,
y21||y20,
y31||y30},
{x1,x2,x3,y1,y2,y3}]
结果:{4350.,{x1100.,x2100.,x30.,y11.,y21.,y30.}}
6.AdistributioncompanywantstominimizethecostoftransportinggoodsfromitswarehousesA,B,andCtotheretailoutlets1,2,and3.Thecosts(in$’s)fortransportingoneunitfromwarehousetoretaileraregiveninthefollowingtable.
Thefixedcostofoperatingawarehouseis$500forA,$750forB,and$600forC,andatleasttwoofthemhavetobeopen.Thewarehousescanbeassumedtohaveadequatestoragecapacitytostoreallunitsdemanded,ie.,assumeeachwarehousecanstore525units.
Retailer
Warehouse
1
2
3
A
$15
$32
$21
B
$9
$7
$6
C
$11
$18
$5
Demand
200
150
175
Formulateanintegerlinearprogramforthedistributioncompanytominimizeitsoverallcost.
Definethedecisionvariables:
x11:theamountofproductstramiitedfromwarehouseAtoretailer1;
x12:theamountofproductstramiitedfromwarehouseAtoretailer2;
x13:theamountofproductstramiitedfromwarehouseAtoretailer3;
x21:theamountofproductstramiitedfromwarehouseAtoretailer1;
x22:theamountofproductstramiitedfromwarehouseAtoretailer2;
x23:theamountofproductstramiitedfromwarehouseAtoretailer3;
x31:theamountofproductstramiitedfromwarehouseAtoretailer1;
x32:theamountofproductstramiitedfromwarehouseAtoretailer2;
x33:theamountofproductstramiitedfromwarehouseAtoretailer3;
ifproductsistransmittedfromwarehouseA,y1=1;ifnot,y=0;
ifproductsistransmittedfromwarehouseB,y1=1;ifnot,y=0;
ifproductsistransmittedfromwarehouseC,y1=1;ifnot,y=0;
definetheobjectivefunction:
(1)thedemandofretailer1is200:
x11+x21+x31=200;
(2)thedemandofretailer2is150:
x12+x22+x32=150;
(3)thedemandofretailer3is175:
x31+x32+x33=175;
(4)themaxvolumeofwarehouseAis525,sothetotalamounttransmiitedfromwarehouseAshouldnotgetover525:
x11+x12+x13<=525y1;
(5)themaxvolumeofwarehouseBis525,sothetotalamounttransmiitedfromwarehouseAshouldnotgetover
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