Seminar Nasional IENACO ISSN: METODE USULAN UNTUK ANALISIS SENSITIFITAS DALAM PEMILIHAN PEMASOK

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1 Semr Nsol IENACO - 07 ISSN: METODE USULAN UNTUK ANALISIS SENSITIFITAS DALAM PEMILIHAN PEMASOK Agus Rstoo *, Prtkto, Puromo Bud Stoso 3, Ishrdt Pmbud Tm 4, Jurus Tekk Mes, 3,4 Jurus Tekk Idustr Fkults Tekk, Uversts Brwjy Jl. MT Hryoo, Mlg. * Eml: gus.rstoo@upyk.c.d Abstrk Selecto of supplers s to determe the best suppler bsed o severl crter tht re mportt to the compy. Therefore, the selecto of supplers s the problem of mult-crter decso mkg (MCDM). Curret reserch treds re combg two or more methods of MCDM the selecto of supplers. However, the colto does ot ecessrly produce better model. A good model the suppler selecto s ot sestve to chges crter weghts. My studes, such s Polt (05), Ptchpoo et l. (03) d others, mke chges to the weghtg of crter ot bsed o rel codtos. Ths study proposes ew wy to perform sestvty lyss o the model of suppler selecto. The proposed method wll prove tht the coclusos of prevous reserch the suppler selecto (Polt, 05; Ptchpoo et l. (03)) whch combes two MCDM s ot ecessrly better th just oe MCDM oly. Kt kuc: crter, sestvty lyss, mult-crter decso mkg, suppler selecto. PENDAHULUAN Pd proses pemlh pemsok, bsy perush memlk beberp krter sebg pertmbg dlm memlh pemsok terbk. Pd umuy, jrg d stu pemsok yg memlk uggul d semu krter yg dpertmbgk oleh perush tersebut. Jd, perlu dy pembobot terhdp tp-tp krter tersebut sehgg dpt dguk sebg dsr dlm pel utuk tp pemsok. Oleh kre tu, pemlh pemsok termsuk dlm mslh mult-crter decso mkg (MCDM). Metode MCDM yg dguk dlm pemlh pemsok dpt dbg dlm du kelompok, yk berdr sedr d kombs. Pd ms yg k dtg, d kecederug bhw kombs MCDM dlm pemlh pemsok semk dmt oleh peelt (Ch et l., 03; Ho et l., 00). Als peggu kombs MCDM dlh bhw deg megkombsk du MCDM tu lebh k memberk hsl yg lebh bk dr pd jk hy megguk MCDM secr berdr sedr. Stu metode MCDM yg plg byk dguk dlm kombs tersebut dlh Alytc Herrchy Process (AHP) (Govd et l., 05; Zmmer et l., 05). AHP serg dkombsk deg ELmto Et Chox Trdust l RElté (ELmto d Choce Expressg RElty) (ELECTRE) (Erty et l. (0)), TOPSIS (Freem d Che (05); Prmk et l. (06)), preferece rkg orgzto method for erchmet evlutos (PROMETHEE) (Polt (05)), d Grey Reltol Alyss (GRA) (Zolf et l. (0), Ptchpoo et l. (0 ; 03)). Fugs AHP dlm kombs MCDM utuk pemlh pemsok dlh sebg pembobot pd tp krter. Bukt yg sellu dsmpk oleh pr peelt dlm peelt pemlh pemsok deg megguk kombs MCDM d pd lss sestftsy. Merek berggp bhw solus model pemlh pemsok yg tdk meglm perubh ketk terjd perubh pd bobot krter dggp sebg model pemlh pemsok yg bk. Ak tetp yg mejd mslh dlh pkh perubh tersebut sesu deg kods yt tu tdk. Semu peelt tetg pemlh pemsok yg d sellu membut skero perubh bobot krter secr lgsug. Arty bhw perubh tersebut tdk ddsrk pd perubh kods tertetu tu kre sebb-sebb tertetu. Perubh bobot krter yg tdk ddsrk pd perkr perubh kods yg sebery, megkbtk pd hsl kesmpul yg belum tetu sesu kods yt pul. Oleh kre tu, berdsrk pd kelemh tersebut dts, mk peelt megusulk 60

2 Semr Nsol IENACO - 07 ISSN: sebuh cr bru dlm membut sebuh lss sestfts yg ddsrk pd perubh kods yg sebery.. METODOLOGI Thp Peelt Thp pertm yg k dllu dlm peelt dlh peetu bobot krter deg megguk AHP. Thp kedu dlh pemlh pemsok deg megguk MCDM l, yk PROMETHEE d GRA. Thp berkuty dlh lss sestfts. Pd thp dlkuk rekys perubh jumlh teg hl (expert) yg memberk l perbdg berpsg (pr wse comprso) terhdp krter-krter yg dpertmbgk dlm pemlh pemsok. Apbl dktk bhw d perubh %, mk berrt d % kuesoer dr totl jumlh kuesoer hsl s teg hl yg dytk btl tu tdk vld tu tdk kosste kre cosstecy rto (CR)<0,0 tu mugk jug teg hly berkurg % kre tdk bersed memberk pel tu ls l. Hl tetuy sgt lebh sesu deg kods yg sebery, dbdgk deg hy merubh % terhdp bobot krter secr lgsug. Ketg thp tersebut dpt dlustrsk sepert tmpk pd Gmbr d. Thp Pembobot krter megguk AHP Thp Pemlh pemsok terbk megguk MCDM l (PROMETHEE tu GRA) Thp 3 Alss Sestfts (Perbdg metode AHP-PROMETHEE deg AHP-GRA sert AHP sj) Gmbr. Thp peelt Peyebr kuesoer kepd beberp teg hl (expert) Teg hl megs kuesoer perbdg berpsg tr krter yg dpertmbgk dlm pemlh pemsok Pembobot krter megguk AHP Pemlh pemsok megguk PROMETHEE Pemlh pemsok megguk AHP sj Pemlh pemsok megguk GRA Perbdg tr metode deg megguk Alss sestfts Kesmpul d sr Gmbr. Alur peelt 603

3 Semr Nsol IENACO - 07 ISSN: Deg megguk lss sestfts, bsy djdk lt bg peelt dlm pemlh pemsok utuk membdgk tr kombs MCDM deg metode l d tu metode MCDM secr mdr. Peelt-peelt pemlh pemsok yg megguk kombs AHP deg MCDM ly sellu meympulk bhw peggu kombs AHP deg MCDM l lebh bk dbdgk deg jk hy megguk AHP sj. Merek medsrk pd lss sestfts tersebut. Oleh kre tu, hpotess dlm peelt dlh bhw belum d jm bhw kombs AHP deg MCDM l lebh bk jk dbdgk deg AHP sj, jk lss sestftsy dlkuk secr keyt. Expert [Pr-wse comprso mtrx ( j)] Expert [Pr-wse comprso mtrx ( j)] Expert [Pr-wse comprso mtrx ( j)] Normlzed mtrx (N j) Geometrc me [Pr-wse comprso mtrx ( j)] Reltve weght mtrx ( ) Evluto mtrx (E j) Sum mtrx ( ) Egevlue mtrx (λ ) Egevlue mx (λ mx) Cosstecy dex (CI) Cosstecy rto (CR) j E 3 rdomdex RI RI CI CR ; crter umberof CI ; mx 3 mx j N... j Gmbr 3. Alur proses AHP 3. HASIL DAN PEMBAHASAN Cotoh umerk Agr dpt dkethu keber hpotess peelt, mk dberk dt pel berpsg dr lm teg hl utuk em krter sepert pd Lmpr. Sedgk hsl rt-rt geometrk hsl pel berpsg dr kelm gket teg hl dpt drgks dlm Tbel. Demk pul utuk dt pel dr msg-msg pemsok (S, S, S3, S4) utuk tp krter d d Lmpr, deg rt-rt geometrky d pd Tbel. Deg megguk dt tersebut, mk dolh megguk AHP deg lur sepert pd Gmbr 3. Hsl pembobot krter deg megguk lur tersebut dpt dlht pd Tbel 3.

4 Semr Nsol IENACO - 07 ISSN: Hsl pemlh pemsok deg AHP dpt dlkuk megguk Tbel d Tbel 3. Perhtug deg PROMETHEE dm boboty bersl dr Tbel 3 (AHP) dpt dlht pd Tbel 4. Demk pul utuk perhtug GRA dm boboty bersl dr Tbel 3 (AHP) dpt dlht d Tbel 4. Rc cr PROMETHEE d GRA dpt dbc dlm Polt (05) d Ptchpoo et l. (0; 03). Tbel. Perbdg berpsg (rt-rt geometrk) Prce Qulty Fclty Experece Sfety Fcl Prce Qulty Fclty Experece Sfety Fcl Tbel. Dt tp pemsok (rt-rt geometrk) Prce Qulty Fclty Experece Sfety Fcl S S S S Tbel 3. Hsl pembobot krter deg AHP Krter Prce Qulty Fclty Experece Sfety Fcl Bobot Tbel 4. Resume solus msg-msg metode AHP GRA PROMETHEE AHP-GRA AHP- PROEMTHEE S S S S Tbel 5. Urut pemsok dr msg-msg metode AHP GRA PROMETHEE AHP-GRA AHP- PROEMTHEE S S4 S S4 S S S3 S S3 S S3 S S3 S S3 S4 S S4 S S4 Alss sestfts Alss dguk utuk megethu pkh deg megguk kombs MCDM k memberk hsl yg lebh bk tu tdk jk dbdgk deg jk hy stu MCDM secr mdr. Adpu usul dlm lss dlh bhw k dlkuk rekys pegurg jumlh teg hl yg megs kuesoer perbdg berpsg. Apbl kelm teg hl megs semu d vld mk dytk 00%. Nmu jk d stu teg hl yg tdk megs kuesoer tu tdk vld, mk berkurg dr 5 teg hl tu (/5)*00% = 0% berkurg, sehgg tggl 80% sj. Demk pul jk berkurg teg hl (60%) smp deg hy tggl teg hl sj (0%). Hsl lss sestfts tr AHP, PROMETHEE, d AHP-PROMETHEE dpt dlht pd Gmbr 4. Dr Gmbr 4 dpt djelsk bhw urut pemsok tdk meglm perubh sm sekl. Bhk urut pemsok tr AHP d PROMETHEE deg kombs AHP-PROEMTHEE dlh sm. Hy sj, PROMETHEE mupu kombsy (AHP- PROEMTHEE) lebh jels perbed l tr pemsoky. Dlm hl, pemsok S3 deg S4 terlht jels perbedy. Oleh kre tu, dpt dsmpulk bhw kombs AHP- 605

5 Semr Nsol IENACO - 07 ISSN: PROMETHEE memberk hsl yg sm bk jk hy megguk AHP tu PROMETHEE sj. Bhk, deg megkombsk keduy hy mejdk pegolh dty tmbh pjg, sehgg tdk efse. Hsl lss sestfts tr AHP, GRA, d AHP-GRA dpt dlht pd Gmbr 5. Dr Gmbr 5 dpt djelsk bhw urut pemsok tdk meglm perubh sm sekl. Bhk urut pemsok tr GRA deg kombs AHP-GRA dlh sm, sedgk AHP dlh keblk dr hsl keduy. Hy sj, GRA lebh jels perbed l tr pemsoky jk dbdgk deg kombsy (AHP-GRA). Dlm hl, pemsok S3 deg S4 terlht jels perbedy. Peyebby bs jd kre pegruh bobot dr AHP. Hl kre sft dr hsl AHP memlk l yg terput tdk juh, kre megguk bobot prosetse. Dpt dsmpulk bhw kombs AHP-GRA memberk hsl yg sm bk jk hy megguk GRA sj. Bhk, deg megkombsk keduy hy mejdk pegolh dty tmbh pjg, sehgg tdk efse solus AHP solus PROMETHEE % 80% 60% 40% 0% S S S3 S () solus AHP-PROMETHEE S S S3 S4 (b) S S S3 S4 Gmbr 4. Alss sestfts () AHP, (b) PROMETHEE, (c) kombs AHP-PROMETHEE (c) 606

6 Semr Nsol IENACO - 07 ISSN: solus AHP solus GRA % 80% 60% 40% 0% % 80% 60% 40% 0% S S S3 S4 S S S3 S4 () (b) solus AHP-GRA % 80% 60% 40% 0% (c) S S S3 S4 Gmbr 5. Alss sestfts () AHP, (b) GRA, (c) kombs AHP-GRA 4. KESIMPULAN Kesmpul yg dpt dmbl dlh bhw lss usul sgt sesu deg kods sesugguhy, dbdgk deg lss sesstfts pr peelt sebelumy. Sel tu, kombs MCDM belum bs mejm bhw hsly k lebh bk dbdgk deg hy megguk stu MCDM sj. Hl ddsrk pd lss usul yg sesu keyt. Sr utuk peelt seljuty dlh bhw metode MCDM yg dguk sebky dtmbh, mslk Dt Evelopmet Alyss (DEA), ELECTRE, d ly. Sel tu, perlu dperbyk lg cotoh umerk, sehgg pembukty k lebh kut. DAFTAR PUSTAKA Ch, J., Lu, J. N. K., d Ng, E.. T., 03, Applcto of decso-mkg techques suppler selecto: A systemtc revew of lterture, Expert Systems wth Applctos, ol. 40, No. 0, ,: Erty, T., Khvec, A., d Tblı, R. M., 0, A tegrted mult-crter group decsomkg pproch to effcet suppler selecto d clusterg usg fuzzy preferece reltos, Itertol Jourl of Computer Itegrted Mufcturg, ol. 4, No., 5-67,: Freem, J. d Che, T., 05, Gree suppler selecto usg AHP-Etropy-TOPSIS frmework, Supply Ch Mgemet, ol. 0, No. 3, ,: 607

7 Semr Nsol IENACO - 07 ISSN: Govd, K., Rjedr, S., Srks, J., d Muruges, P., 05, Mult crter decso mkg pproches for gree suppler evluto d selecto: lterture revew, Jourl of Cleer Producto, ol. 98, 66 83,: Ho,., Xu, X., d Dey, P. K., 00, Mult-crter decso mkg pproches for suppler evluto d selecto: A lterture revew, Europe Jourl of Opertol Reserch, ol. 0, No., 6 4,: Ptchpoo, P., Pousmy,., d Svprksm, R., 03, Modelg d developmet of decso support system for suppler selecto the process dustry, Jourl of Idustrl Egeerg Itertol, ol. 9, Ptchpoo, P., ekumr, P. d Rjkrukr, S., 0, A dstct decso model for the evluto d selecto of suppler for chemcl processg dustry, Itertol Jourl of Producto Reserch, ol. 50, No. 6, ,: Polt, G., 05, Subcotrctor selecto usg the tegrto of the AHP d PROMETHEE methods, Jourl of Cvl Egeerg d Mgemet, Prmk, D., Hldr, A., Modl, S. C., Nskr, S. K., d Ry, A., 06, Reslet suppler selecto usg AHP-TOPSIS-QFD uder fuzzy evromet, Itertol Jourl of Mgemet Scece d Egeerg Mgemet, Zmmer, K., Fröhlg, M., d Schultm, F., 05, Sustble suppler mgemet revew of models supportg sustble suppler selecto, motorg d developmet. Itertol Jourl of Producto Reserch, Zolf, S. H., Che, I. S., Rezey, N., d Tmošteė, J., 0, A hybrd MCDM model ecompssg AHP d COPRAS-G methods for selectg compy suppler Ir, Techologcl d Ecoomc Developmet of Ecoomy, ol. 8, No. 3, ,: LAMPIRAN. Tbel.. Is gket teg hl Krter Prce (C) Qulty (C) Fclty (C3) Experece Sfety (C5) Fcl (C6) Prce (C) Qulty (C) Fclty (C3) Experece Sfety (C5) Fcl (C6)

8 Semr Nsol IENACO - 07 ISSN: Tbel.. Is gket teg hl Krter Prce (C) Qulty (C) Fclty (C3) Experece Sfety (C5) Fcl (C6) Prce (C) Qulty (C) Fclty (C3) Experece Sfety (C5) Fcl (C6) Tbel.3. Is gket teg hl 3 Krter Prce (C) Qulty (C) Fclty (C3) Experece Sfety (C5) Fcl (C6) Prce (C) Qulty (C) Fclty (C3) Experece Sfety (C5) Fcl (C6) Tbel.4. Is gket teg hl 4 Krter Prce (C) Qulty (C) Fclty (C3) Experece Sfety (C5) Fcl (C6) Prce (C) Qulty (C) Fclty (C3) Experece Sfety (C5) Fcl (C6)

9 Semr Nsol IENACO - 07 ISSN: Tbel.5. Is gket teg hl 5 Krter Prce (C) Qulty (C) Fclty (C3) Experece Sfety (C5) Fcl (C6) Prce (C) Qulty (C) Fclty (C3) Experece Sfety (C5) Fcl (C6) LAMPIRAN. Tbel.. Dt utuk tp pemsok Keterg Prce (C) Qulty (C) Fclty (C3) Experece Sfety (C5) Fcl (C6) S S S S Tbel.. Dt utuk tp pemsok Keterg Prce (C) Qulty (C) Fclty (C3) Experece Sfety (C5) Fcl (C6) S S S S Tbel.3. Dt 3 utuk tp pemsok Keterg Prce (C) Qulty (C) Fclty (C3) Experece Sfety (C5) Fcl (C6) S S S S Tbel.4. Dt 4 utuk tp pemsok Keterg Prce (C) Qulty (C) Fclty (C3) Experece Sfety (C5) Fcl (C6) S S S S

10 Semr Nsol IENACO - 07 ISSN: Tbel.5. Dt 5 utuk tp pemsok Keterg Prce (C) Qulty (C) Fclty (C3) Experece Sfety (C5) Fcl (C6) S S S S