william j. stevenson
DESCRIPTION
OPERATIONS RESEARCH. Operations Management. Enos. William J. Stevenson . 8 th edition. DUALITAS DALAM LINEAR PROGRAMING. KONSEP DUALITAS . Setiap persoalan linear programing mempunyai suatu linear program yang berkaitan, yang disebut “dual”. - PowerPoint PPT PresentationTRANSCRIPT
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6s-1 Linear Programming
William J. Stevenson
Operations Management
8th edition
OPERATIONSRESEARCH
Enos
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6s-2 Linear Programming
DUALITAS DALAM LINEAR PROGRAMING
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6s-3 Linear Programming
KONSEP DUALITAS · Setiap persoalan linear programing mempunyai
suatu linear program yang berkaitan, yang disebut “dual”.
· Solusi dari persoalan asli LP (Primal), juga memberikan solusi pada dualnya
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6s-4 Linear Programming
Hubungan primal-dual
Primal Dual
Batasan i Variabel i
Fungsi Tujuan Nilai Kanan
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6s-5 Linear ProgrammingContoh :
MerekMesin
I1 I2 Kapasitas Maksimum
1 2 0 82 0 3 153 6 5 30
Sumbangan laba 3 5
MerekMesin
X1 X2
Y1 2 0 ≤ 8Y2 0 3 ≤ 15Y3 6 5 ≤ 30
≥ 3 ≥ 5
Tabel primal-dual
(masalah primal)
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6s-6 Linear Programming
Fungsi primal-dualTujuan :Maks Z = 3X1 + 5X2
Batasan :2X1 83X2 156X1 + 5X2 30
danX1 ≥ 0, X2 ≥ 0
Tujuan :Min Y = 8Y1 + 15Y2 + 30Y3
Batasan :2Y1 + 6 Y3 ≥ 33Y2 + 5 Y3 ≥ 5
danY1 ≥ 0, Y2 ≥ 0, Y3 ≥ 0
MerekMesin
X1 X2
Y1 2 0 ≤ 8Y2 0 3 ≤ 15Y3 6 5 ≤ 30
≥ 3 ≥ 5
Tabel primal-dual
Batasan i
Variabel i
Fungsi Tujuan
Nilai Kanan
Kunci 1
Kunci 2
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6s-7 Linear Programming Interpretasi EkonomisFungsi primal
n
jjj XCZ
1
Maks:Tujuan
n
jijij bXa
1
Batasan
Dengan menggantikan Zj, metode simpleks dapat diartikan mencari nilai Ym
Fungsi dual
m
iiiYbY
10Min :Tujuan
m
ijiij CYa
1
Batasan
Xj = Tingkat aktivitas ke jCj = Laba persatuan aktivitas jZ = Laba total dari seluruh aktivitasbi = Jumlah sumber i yang tersediaaij = jumlah sumber i yang “dipakai” oleh setiap satuan
aktivitas j
Yi = kontribusi persatuan sumber i terhadap laba
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6s-8 Linear ProgrammingHasil masalah dual
Tujuan : Min Y = 8Y1 + 15Y2 + 30Y3
Batasan :2Y1 + 6 Y3 ≥ 33Y2 + 5 Y3 ≥ 5
danY1 ≥ 0, Y2 ≥ 0, Y3 ≥ 0
Y1 = 0, Y2 = 5/6, Y3 = 1/2
Y = 8(0) + 15(5/6) + 30(1/2)
Y = 271/2
Analisis Simplex
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6s-9 Linear Programming
SEKIANTERIMAKASIH
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6s-10 Linear Programming End of Slide show, clik to exit
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6s-11 Linear Programming
Interpretasi dual yang lain :· Marginal Value
· Shadow Price· Surplus Variabel
Tugas !!!! (Tidak di kumpulkan)
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6s-12 Linear ProgrammingALAT ANALISIS
· QSB+· AB:QM· AB:POM· QM (DOS/WINDOWS)· LINDO· SAS