BAB 6 KESIMPULAN DAN SARAN 6.1. Kesimpulan Dari
analisis
data
yang
dilakukan,
dapat
disimpulkan bahwa dari 4 jenis produk spare part yang dianalisis, dipilih
untuk
skenario
meminimasi
total
pemesanan
biaya
produk
persediaan
secara
periodik
dengan frekuensi pemesanan 15 hari kerja dan jumlah pemesanan spare part yang berubah tiap kali pemesanan karena mempertimbangkan sisa produk yang ada di gudang dan target tingkat persediaan yang telah ditetapkan. Jumlah total biaya persediaan produk spare part kelas A pada
kondisi
sedangkan
riil
pada
sebesar
hasil
simulasi
Rp
21.361.920.516,98
terbaik
sebesar
Rp
19.811.117.162,10. Dari perbandingan ini dapat terlihat bahwa
terjadi
penghematan
biaya
sebesar
Rp
1.550.803.354,88 atau 7,26 % 6.2. Saran PT dalam
Menara
Agung
menentukan
belum
sistem
memiliki
persediaan
metode
spare
tertentu
part.
Oleh
karena itu, penulis menyarankan untuk untuk melakukan pendekatan
simulasi
dengan
skenario
terpilih
dalam
menentukan jumlah dan kapan pemesanan spare part harus dilakukan.
72
DAFTAR PUSTAKA
Baroto, T., 2002, “Perencanaan dan Pengendalian Produksi”, Ghalia Indonesia, Jakarta. Damayanti, Y. R., 2009, “Perencanaan Persediaan Produk di Showroom Plasa Ambarukmo (Studi Kasus di UKM Rumah Warna)”, Skripsi di Program Studi Teknik Industri, Fakultas Teknologi Industri, Universitas Atma Jaya Yogyakarta. Handoko, T., 2002, “Dasar-Dasar Operations Research”, BPFE, Yogyakarta. Haryanto, S., 2010, “Analasis Perencanaan Persediaan Spare Part Mesin Tenun di PT Kusuma Sandang Mekar Jaya”, Skripsi di Program Studi Teknik Industri, Fakultas Teknologi Industri, Universitas Atma Jaya Yogyakarta. Law, M., dan Kelton, W.D., 1991, “Simulation Modeling and Analysis”, Ed.2, McGraw Hill, Singapore Law, M., dan Kelton, W.D., 2000, “Simulation Modeling and Analysis”, Ed.3, McGraw Hill, Singapore Siswanto, 1985, “Persediaan Model dan Analisis”, Andi Offset, Yogyakarta. Tersine, R.J., 1994, “Principles of Inventory and Materials Management”, Ed.4, Prentice – Hall International, London Waters, D., 2003, “Inventory Control and Management”, Ed.2, West Sussex, England Winoto, Y. R., 2008, “Inventory Control Policy of Biscuit and Snack in Distribution Company (Case Study at Perusahaan Roti Cipto, Gombong)”, Skripsi di Program Studi Teknik Industri, Fakultas Teknologi Industri, Universitas Atma Jaya Yogyakarta.
73
http://digilib.its.ac.id/public/ITS-Undergraduate-70482502100035-bab2.pdf http://id.wikipedia.org/wiki/Klasifikasi_ABC http://kur2003.if.itb.ac.id/file/CN%20IF2152%20Beberapa %20Distribusi%20Peluang%20Kontinu%20II%20.pdf http://www.bankbca.co.id/resource/suku_bunga.asp, diakses pada tanggal 15 Januari 2011 pukul 10:30 WIB. http://www.scribd.com/doc/47048824/Trik-PemrogramanMicrosoft-Excel
74
Lampiran 1 : Data Permintaan Tire Hari
Jan
1 2
138
3
Feb
Mar
Apr
Mei
Jun
Jul
123
135
129
173
173
129
167
138
104
134
183
120
129
137
105
187
4
117
129
182
120
115
5
142
154
134
127
124
156
6
123
138
173
139
141
7
127
130
138
8
125
109
144
153
128
9
173
132
173
126
137
130
105
10 11
138
105
126
12
129
129
124
152
13
113
163
182
123
14
138
15
122
137
16
183
127
17
142
138
148
184 143
173
173
111
123
128
152
164
131
129
103
174
20
183
105
129
143
114
21
148
114
173
22
142
129
120
147
136
23
153
154
134
106
120
108
103
109
137
29
156
173
125
30
193
132
133
31
128
182
123
163
163
194
163
143
142
143
178
185
163
133
194
146
173 143
166
139
138
139
119
110
169
138
134
104
186
129
145
176
147
127
189
140
112
113
185 123
120
179
194 184
131
132
147
164
143
137
132
185 153
185
125
127
140 126
142
173
194 148
171
136
143
163
139
166
184
132
165
163
173
179
173
137
110
137
184
181
175
117
145
134
183
156 197
138
196
184
142 114
119
133
128
125
163
163
103
129
138
136
146
138
113
128
128
172
162
129
135
201
129
135
163
125
120
197
143
129
75
172
142
102
123
108
121
119
119
176
119
131
122
167
126
183
28
173
142
125
143
164
147
128
162
168
129
123
132
136
114
127
19
134
135
163
134
183
184
153
117
27
187
183
110
135
148
120
183
143
194
123
138
152
126
147
112
124
139
164
183
26
164
129
172
139
Des
184
129
25
Nov
154
18
24
Okt
162
104
104
Sept
127
139
126
Agst
139 128
136
Lampiran 2 : Data Permintaan AHM Oil Hari
Jan
1 2
589
3
Feb
Mar
563
595
590
538
553
551
Apr 529
803
Mei 597
Jun 542
629
621
576
529
566
505
4
617
527
607
563
615
5
765
583
534
597
556
556
6
586
594
572
541
7
632
630
586
8
625
609
544
553
542
9
573
571
653
601
594
778
595
10
532
11
638
762
847
12
564
578
597
576
13
613
663
593
14
607
15
622
597
16
609
554
17
681
542
584
629
575
499
586
593
529
20
609
564
543
774
21
577
564
573
22
556
583
594
547
604
23
582
632
585
594
635
573
531
25
566
758
538
26
574
27
739
28
583
29
601
584
696
30
573
632
574
566
584
578
585
584
635
594
548
618 543
560
569
594
583
759
586
573
594
772
547
519
504
590
591
754
607 594
595
579
594 582
531
554
626 728
571
596
543
663
639
596
784
724
592
578
583
579
803
662
710
737
584
582
627
517
764
534
591
756 697
528
545
548
532 569
560
682
585
625
598
546
593
753
538
536
584
638
805
728
592
594
594
729
766
601
710
593
546
774
622
597
684
562
76
590
628
622
557
543
576
592
617
606
556
689
627
594
776
726
676
565
566
748
587
572
518
611
605
563
645
539
753
764
604
584
785
558
574 597
575
782
752
31
604
540 494
596
508
576
808
541
628
753
753
543
557
594
567
595
590
582
564
794
727
532
523
574
757
567
623
585
773
594
753
636
589
608
543
593
520
543
597
584
723
19
24
539
574
18
548
548
684
574
Des 594
594
575
Nov 704
703
569
Okt 539
753
508
Sept 618
678
555
601
Agst
597
604
574
636
Jul
639 613
783
Lampiran 3 : Data Permintaan Shock Absorber Hari
Jan
1 2
286
3
Feb
Mar
Apr
Mei
264
196
228
282
256
238
288
212
204
238
204
262
200
274
192
236
228
266
206
186
256
264
278
246
214
252
208
240
274
204
256
194
196 284
266
272
234
198
256
6
286
232
194
172
244
7
218
230
186
8
224
204
244
254
242
9
214
276
152
200
194
178
196
276
246
194
284
13
214
282
264
192
14
208
15
222
286
242
16
206
254
17
252
264
194
206
244
190
284
238
186
256
272
274
248
218 244
226
220
188
254
226
244
194
242
266
204
244
218
234
256
286
250
208
194
254
228
190
258
206
208
182
184
238
212
220
274 228
202
258
294
254
266
186
192
20
208
248
264
246
274
21
176
264
172
22
284
284
216
248
204
23
262
228
288
194
234
272
232
258
238
236
228 274
188
192
222
254
204
190
190
254
204
276
216
194
186
226
242
254
248
216
194
25
266
26
274
27
240
28
274
29
202
252
228
30
244
232
236
254 216
224
238
218
278
264
194
264
264 204
186
272
238
272
230
248
280
264
226 248
234
196
242
238
196
238
284
184
194
192
286
274
266
195
202
258
210
238
226
218
244
276
264
234
248
182
274
228
196
184
204 238
186
226
198
246
194
254
238
236
184
238
204
228
254
274
296
230
166
204
264
238
246
246
222
264
274
262
77
276
242
264
266
268
194
19
31
269
276
204
232
202
268
238
240
252
230
168
274
274
208
18
24
194
198
204
274
236
Des
264
266
12
Nov
248
5
246
Okt
228
206
272
Sept
256
224
238
Agst
242
218
11
Jul
194
4
10
Jun
238 214
274
Lampiran 4: Uji Distribusi Data Permintaan Drive Chain Kit (HGP)
Distribution Summary
Distribution Expression Square Error
: : :
Normal NORM(201, 34.9) 0.016115
Chi Square Test Number of intervals Degrees of freedom Test Statistic Corresponding p-value
= = = <
Kolmogorov-Smirnov Test Test Statistic Corresponding p-value
= 0.133 < 0.01
13 10 57.6 0.005
Data Summary Number of Data Points Min Data Value Max Data Value Sample Mean Sample Std Dev
= = = = =
301 123 286 201 35
Histogram Summary Histogram Range Number of Intervals
= 123 to 286 = 17
78
Lampiran 5 : Uji Distribusi Data Permintaan Tire
Distribution Summary Distribution Expression Square Error
: : :
Gamma 102 + GAMM(18.6, 2.28) 0.010611
Chi Square Test Number of intervals Degrees of freedom Test Statistic Corresponding p-value
= = = <
24 21 125 0.005
= = = = =
301 102 201 144 24.4
Data Summary Number of Data Points Min Data Value Max Data Value Sample Mean Sample Std Dev Histogram Summary Histogram Range Number of Intervals
= 102 to 202 = 100
79
Lampiran 6 : Uji Distribusi Data Permintaan AHM Oil
Distribution Summary Distribution Expression Square Error
: Gamma : 494 + GAMM(49.7, 2.36) : 0.028685
Chi Square Test Number of intervals Degrees of freedom Test Statistic Corresponding p-value
= = = <
Kolmogorov-Smirnov Test Test Statistic Corresponding p-value
= 0.112 < 0.01
11 8 148 0.005
Data Summary Number of Data Points Min Data Value Max Data Value Sample Mean Sample Std Dev
= = = = =
301 494 847 612 74.4
Histogram Summary Histogram Range Number of Intervals
= 494 to 847 = 17
80
Lampiran 7 : Uji Distribusi Data Permintaan Shock Absorber
Distribution Summary Distribution Expression Square Error
: Beta : 152 + 144 * BETA(2.06, 1.57) : 0.008805
Chi Square Test Number of intervals Degrees of freedom Test Statistic Corresponding p-value
= = = <
Kolmogorov-Smirnov Test Test Statistic Corresponding p-value
= 0.053 > 0.15
14 11 49.4 0.005
Data Summary Number of Data Points Min Data Value Max Data Value Sample Mean Sample Std Dev
= = = = =
301 152 296 234 31.5
Histogram Summary Histogram Range Number of Intervals
= 152 to 296 = 17
81
82
Lampiran 9 : Contoh Form Fix Order PT Menara Agung
FIXED ORDER 2010 PT ASTRA HONDA MOTOR
NAMA MAIN DEALER :Menara Agung
PARTS DIVISION
JANUARI No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
Kelompok Barang
Qty
DRIVE CHAIN KIT (HGP) TIRE AHM OIL SHOCK ABSORBER ELECTRICAL PARTS BRAKE SYSTEM PISTON KIT CAM CHAIN KIT BEARING CABLE BATTERY DISK CLUCTH CONN ROD KIT IMPORT PARTS RIM WHEEL RING PISTON RUBBER PARTS SPARKPLUG MUFFLER GASKET DRIVE CHAIN KIT (HVL) OIL SEAL SPOKE TUBE (HGP + HVL) RACE STRG KIT VALVE SPROCKET GUIDE SPROCKET DRIVE SPROCKET DRIVEN STRIPPING DISK CLUTCH (HVL) MERCHANDISE RING PISTON (HVL) BRAKE FLUID HELMET OTHERS (TOOL) TOTAL
Amount -
Lampiran 10 : Jenis dan Bobot Tire
83
-
No.
Part Number
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
44711KPW861 44711KPH881 44711KTM850 44711KVB930 44711KWC901 44711KWW010 44711KWB922 42711KPW861 2501840PU261TT 42711KPH881 42711KTM850 42711KVB930 42711KWC901 42711KWW010 42711KWB922 300174PRU711TT 3001852PU705TT
Description TIRE,FR,22517LU200 TIRE,FR,25017LF135 TIRE,FR , 70/90-17 TIRE , FR TIRE FR, 70/90-17 FT306 TIRE FR,70/90-17 FT138 TIRE FR, 70/90-17 NF63B TIRE,RR,25017LU701 TIRE,FR TIRE,RR,27517PR135 TIRE,RR ,80/90-17 TIRE, RR TIRE RR, 80/90-17 FT306 TIRE RR,80/90-17 FT138 TIRE RR, 80/90-17 NR78Y TIRE,RR TIRE,RR
84
Price (Rp) 128,970 127,705 125,705 122,070 125,285 125,285 125,080 125,600 121,055 127,170 127,170 122,180 126,515 126,515 125,115 126,390 126,275
Bobot 1.0% 10.0% 15.0% 5.0% 2.0% 2.0% 2.0% 2.0% 1.0% 20.0% 24.0% 6.0% 3.0% 3.0% 3.0% 0.5% 0.5%
Lampiran 11 : Jenis dan Bobot AHM Oil
No.
Part Number
1 2 3 4 5
08232M99K8JN9 08232M99K8JN1 08232M99K8BN9 08233M99K8JN9 08233M99K1JN9
Description MPX1 , 10W30 SJ MA MPX1 , 10W30 SJ MA MPX2 , 10W30 SJ MB SPX-1 0.8L 10W30SJ SPX-1 1.0L 10W30SJ
85
0.8L 1.0L 0.8L JASO MA JASO MA
Harga Jual 25,438 29,375 27,800 30,825 34,775
Bobot 52% 5% 40% 2% 1%
Lampiran 12 : Jenis dan Bobot Shock Absorber
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
Part Number 51400GB6921 51400KEH621 51400KTLN00 51400KTM850 51400KPH881 51400KPH891 51400KVB930 51400KVB940 51401383722 51401GN5781 51401KC5003 51401KCJ691 51401KEV880 51401KPH881 51401GF6970 51401KEH601 51401KEH901 51401KEH950 51401KPH971 51410383723 51410GF6970 51410GN5781 51410KC5920 51410KCJ691 51410KEV880 51410KPH901 51410KTM881 51410KEH601 51410KEH901 51410KEH950 51420KEV650 51420KCJ691 51420KPH881 51420KPH891 51490149840 51490GN5305
Description CUSHION ASSY,FR FRONT FORK ASSY, RH FORK ASSY, R FRONT FORK ASSY R FRONT (DK) FORK ASSY,R FRONT FORK ASSY,R FRONT FORK ASSY,R FRONT FORK ASSY,R FRONT (CW) SPRING,FR FORK SPRING A,FR FORK SPRING,FR FORK SPRING,FR FORK SPRING,FR FORK SPRING,FR FORK SPRING FR FORK SPRING FRONT SPRING FR FORK SPRING FR FORK SPRING, FR FORK PIPE COMP,FR FORK PIPE COMP FR, FORK PIPE COMP,FR FORK PIPE COMP,FR FORK PIPE COMP,FR FORK PIPE COMP,FR FORK PIPE COMP, FRONT FORK PIPE COMP FR FORK PIPE COMP,FR FORK PIPE COMP FR FORK PIPE COMP FR FORK CASE R BOTTOM CASE,R BOTTOM CASE, R. FRONT BOTTOM CASE, R. FRONT BOTTOM SEAL SET FR, FORK SEAL SET,FR FORK
No. 37 38
Part Number 51490KC5305 51490KEJ900
Description SEAL SET,FR FORK SEAL SET,FR FORK
86
Harga Jual 54,990 51,700 50,900 53,160 54,920 47,200 49,510 50,850 50,720 49,380 50,720 46,750 48,710 48,375 50,385 45,075 50,720 50,720 49,045 49,160 53,750 50,350 57,200 57,400 53,030 58,340 57,000 52,810 55,240 55,910 43,850 48,120 47,100 53,080 50,050 59,430 Harga Jual 56,750 52,110
Bobot 0.6% 0.8% 0.3% 0.6% 1.5% 1.0% 0.8% 0.8% 0.6% 0.5% 0.3% 0.8% 2.0% 1.5% 0.6% 1.0% 0.5% 0.3% 1.5% 0.3% 0.5% 0.5% 0.6% 0.8% 2.0% 1.0% 2.0% 1.0% 0.5% 0.3% 1.5% 0.8% 1.0% 1.0% 0.5% 0.5% Bobot 0.6% 0.6%
39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68
51500KEH621 51500KTLN00 51500KTL700 51500KTM850 51500KPH881 51500KPH891 51500KVB930 51500KVB940 51520KPH881 52400GF6931 52400GN5831 52400KC5003 52400KCJ661 52400KCJ671 52400KCJ691 52400KCJ950 52400KEH900 52400KEV882 52400KPH720 52400KTM850 52400KTM850ZB 52400KTMN30 52400KVY961 52A00GN5781 53200KCJ690 53200KEV880 53200KPH720 53200KVB910 90756149841 SS8175ML
FRONT FORK ASSY, LH FORK ASSY, R FRONT FORK ASSY L FRONT FORK ASSY L FRONT (DK) FORK ASSY,L FRONT FORK ASSY, L FRONT FORK ASSY, L FRONT FORK ASSY, L FRONT (CW) CASE, L. FRONT BOTTOM CUSHION ASSY, RR/2 CUSHION ASSY,RR CUSHION ASSY,RR CUSHION ASSY,RR CUSHION ASSY,RR CUSHION ASSY,RR CUSHION ASSY, RR CUSHION ASSY,RR CUSHION ASSY,RR CUSH ASSY,RR CUSH ASSY,RR CUSH ASSY,RR, BLACK CUSHION ASSY, RR CUSHION ASSY,REAR CUSHION SET,RR STEM COMP,STRG STEM COMP,STRG STEM COMP, STRG STEM SUB ASSY,STEERING RSD 27X39X10.5 OIL,SHOCK
87
51,700 50,900 54,535 53,160 54,920 54,200 59,510 50,850 47,100 46,530 54,750 50,500 45,540 44,750 47,400 46,490 46,530 43,700 53,900 59,930 59,930 57,250 50,600 56,930 56,530 54,500 52,557 57,700 55,535 53,400
0.8% 0.6% 0.8% 0.6% 1.5% 1.0% 0.8% 0.8% 1.0% 3.0% 3.0% 4.0% 4.0% 4.0% 4.0% 4.0% 4.0% 5.0% 4.0% 5.0% 4.0% 4.0% 2.0% 0.3% 0.8% 2.0% 1.0% 0.8% 0.2% 1.0%
