Tabel 5.15. Rekapitulasi Perhitungan Safety Stock Distribution Centre
Periode Binjai
Padang Sibolga Medan Tebing Tinggi Siantar
Pekan Baru Mar-15
2537 12907
6060 14068
1177 1071
6251 Apr-15
2536 13050
6015 14077
1158 1062
6242 May-15
2540 13187
5962 14086
1137 1063
6233 Jun-15
2547 13320
5901 14094
1114 1074
6224 Jul-15
2555 13448
5833 14101
1089 1093
6215 Aug-15
2563 13572
5757 14108
1062 1114
6206 Sep-15
2568 13690
5674 14114
1033 1132
6197 Oct-15
2568 13804
5583 14119
1001 1141
6188 Total
30626 157090
71328 168933
13628 13218
74847 Standar Deviasi
12,14 496,97
195,33 31,16
76,56 30,02
32,27 z 95
1,65 1,65
1,65 1,65
1,65 1,65
1,65 Safety Stock
20,02 820,00
322,30 51,42
126,33 49,53
53,25 Sumber : Pengolahan Data
5.2.5. Jumlah Permintaan Setiap Minggu
Distribution Centre
Jumlah permintaan setiap minggu dari setiap distribution centre diperoleh dengan pembagian anatara jumlah permintaan setiap distribution centre
setiap bulan dengan jumlah minggu yang ada pada setiap bulan tersebut. Jumlah permintaan setiap distribution centre dapat dilihat pada tabel 5.16.
Tabel 5.16. Jumlah Permintaan Distribution Centre Setiap Minggu
Periode Jumlah
Minggu Binjai Padang Sibolga Medan Tebing Tinggi
Siantar Pekan Baru
Nov-14 4
642 3073
1542 3507
309 286
1572 Dec-14
4 640
3113 1538
3510 306
283 1570
Jan-15 5
510 2522
1226 2810
242 223
1254 Feb-15
4 636
3191 1525
3515 299
273 1565
Mar-15 4
635 3227
1516 3518
295 268
1563 Apr-15
5 508
2610 1203
2816 232
213 1249
May-15 4
635 3297
1491 3522
285 266
1559 Jun-15
4 637
3331 1476
3524 279
269 1556
Jul-15 5
512 2690
1167 2821
218 219
1243 Aug-15
4 641
3393 1440
3527 266
279 1552
Sep-15 4
642 3423
1419 3529
259 283
1550 Oct-15
5 514
2761 1117
2824 201
229 1238
Total 52
7152 36631
16660 39423
3191 3091
17471 Sumber : Pengolahan Data
5.2.6. Distribution Resources Planning Worksheet
Perencanaan DRP disusun untuk setiap DC dalam time bucket mingguan sebab lead time masing-masing DC tidak melewati 1 bulan atau hanya dalam
mingguan.
Dalam distribution resources planning worsheet terdapat beberapa istilah yang perlu diketahui yaitu :
1. On hand balance adalah jumlah persediaan awal produk yang ada pada
distribution centre. 2.
Safety Stock adalah persediaan untuk melindungi atau menjaga kemungkinan terjadinya kekurangan produk.
3. Lead time adalah waktu yang diperlukan dalam pelepasan order sampai
order diterima di stock room pada distribution centre. 4.
Order quantity adalah jumlah produk yang dikirimkan ke untuk setiap kali pemesanan
5. Demands forecast adalah peramalan jumlah permintaan dari masing-
masing distribution centre 6.
In transit adalah jumlah produk yang sedang dalam proses pendistribusian
7. Projected on hand adalah persediaan yang ada dan siap digunakan.
8. Planned shipments – Receipt Date adalah jadwal perencanaan
penerimaan produk yang dikirim. 9.
Planned shipments – Ship Date adalah jadwal perencanaan pengiriman produk.
Distribution Resources Planning Worksheet untuk setiap distribution centre dapat dilihat pada tabel 5.17 sampai tabel 5.23.
Langkah-langkah pengisian Distribution Resources Planning Sheet untuk Dsitribution Centre Binjai adalah :
1. On hand balance = 86 unit diperoleh dari tabel 5.3 2. Lead time = 1 jam diperoleh dari tabel 5.2
3. Order quantity = 3.500 unit diperoleh dari tabel 5.13 4. Safety stock = 20 unit diperoleh dari tabel 5.15
5. Projected on Hand Past Due = 86 unit diperoleh dari On hand Balance 6. Demands forecast 1
st
Week = 642 unit diperoleh dari tabel 5.16 7. In transit 1
st
Week = 0 unit 8. Planned shipments – Ship Date = 3.500 unit diperoleh dari Order Quantity
9. Planned shipments – Receipt Date = 3.500 unit diperoleh dari Order Quantity
10. Projected on hand 1
st
Week = Projected on Hand Past Due + Order quantity - Demands forecast 1
st
Week = 86 + 3.500 – 642 = 2.944 unit 11. Demands forecast 2
nd
Week = 642 unit diperoleh dari tabel 5.16 12. Projected on hand 2
nd
Week = Projected on hand 1
st
Week - Demands forecast 2
nd
Week = 2.944 – 642 = 2.301 unit 13. Demand forecast 3
rd
Week = 642 unit diperoleh dari tabel 5.16 14. Projected on hand 3
rd
Week = Projected on hand 2
nd
Week - Demand forecast 3
rd
Week = 2.301 – 642 = 1.660 unit 15. Dilakukan hal yang sama dengan proses yang sama untuk 52 minggu ke
depan sehingga Distribution Resources Planning Worksheet terisi secara keseluruhan.
Distribution Resources Planning Worksheet Binjai On Hand Balance : 86
Lead Time : 1 hour = 0 week Safety Stock : 20
Order Quantity : 3.500 unit Distribution Centre : Binjai
Past Due Week
1 2
3 4
5 6
7 8
9 10
11 12
13 Demand Forecast
642 642
642 642
640 640
640 640
510 510
510 510
510
In Transit Projected on Hand
86 2.944
2.302 1.660
1.018 378
3.238 2.598
1.958 1.448
938 428
3.418 2.908
Planned Shipment-Receipt Date
3.500 3.500
3.500
Planed Shipments - Ship Date 3.500
3.500 3.500
Past Due Week
14 15
16 17
18 19
20 21
22 23
24 25
26 Demand Forecast
636 636
636 636
635 635
635 635
508 508
508 508
508
In Transit Projected on Hand
2.908 2.272
1.636 1.000
364 3.229
2.594 1.959
1.324 816
308 3.300
2.792 2.284
Planned Shipment-Receipt Date 3.500
3.500
Planed Shipments - Ship Date 3.500
3.500
Past Due Week
27 28
29 30
31 32
33 34
35 36
37 38
39 Demand Forecast
635 635
635 635
637 637
637 637
512 512
512 512
512
In Transit Projected on Hand
2.284 1.649
1.014 379
3.244 2.607
1.970 1.333
696 184
3.172 2.660
2.148 1.636
Planned Shipment-Receipt Date 3.500
3.500
Planed Shipments - Ship Date 3.500
3.500
Past Due Week
40 41
42 43
44 45
46 47
48 49
50 51
52 Demand Forecast
641 641
641 641
642 642
642 642
514 514
514 514
514
In Transit Projected on Hand
1.636 995
354 3.213
2.572 1.930
1.288 646
3.504 2.990
2.476 1.962
1.448 934
Planned Shipment-Receipt Date 3.500
3.500
Planed Shipments - Ship Date 3.500
3.500
Langkah-langkah pengisian Distribution Resources Planning Sheet untuk Dsitribution Centre Padang adalah :
1. On hand balance = 164 unit diperoleh dari tabel 5.3 2. Lead time = 34 jam diperoleh dari tabel 5.2
3. Order quantity = 15.604 unit diperoleh dari tabel 5.13 4. Safety stock = 820 unit diperoleh dari tabel 5.15
5. Projected on Hand Past Due = 164 unit diperoleh dari On hand Balance 6. Demands forecast 1
st
Week = 3.073 unit diperoleh dari tabel 5.16 7. In transit 1
st
Week = 0 unit 8. Planned shipments – Ship Date = 15.604 unit diperoleh dari Order Quantity
9. Planned shipments – Receipt Date = 15.604 unit diperoleh dari Order Quantity
10. Projected on hand 1
st
Week = Projected on Hand Past Due + Order quantity - Demands forecast 1
st
Week = 164 + 15.604 – 3.073 = 12.695 unit 11. Demands forecast 2
nd
Week = 3.073 unit diperoleh dari tabel 5.16 12. Projected on hand 2
nd
Week = Projected on hand 1
st
Week - Demands forecast 2
nd
Week = 12.695 – 3.073 = 9.622 unit 13. Demand forecast 3
rd
Week = 3.073 unit diperoleh dari tabel 5.16 14. Projected on hand 3
rd
Week = Projected on hand 2
nd
Week - Demand forecast 3
rd
Week = 9.622 – 3.073 = 6.549 unit 15. Dilakukan hal yang sama dengan proses yang sama untuk 52 minggu ke
depan sehingga Distribution Resources Planning Worksheet terisi secara keseluruhan.
Tabel 5.18. Distribution Resources Planning Worksheet untuk Distribution Centre Padang
Distribution Resources Planning Worksheet Padang On Hand Balance : 164
Lead Time : 34 hour = 0 week Safety Stock : 820
Order Quantity : 15.604 unit Distribution Centre : Padang
Past Due Week
1 2
3 4
5 6
7 8
9 10
11 12
13 Demand Forecast
3.073 3.073
3.073 3.073
3.113 3.113
3.113 3.113
2.522 2.522
2.522 2.522
2.522
In Transit Projected on Hand
164 12.695
9.622 6.549
3.476 15.967
12.854 9.741
6.628 4.106
1.584 14.666
12.144 9.622
Planned Shipment-Receipt Date 15.604
15.604 15.604
Planed Shipments - Ship Date 15.604
15.604 15.604
Past Due Week
14 15
16 17
18 19
20 21
22 23
24 25
26 Demand Forecast
3.191 3.191
3.191 3.191
3.227 3.227
3.227 3.227
2.610 2.610
2.610 2.610
2.610
In Transit Projected on Hand
9.622 6.431
3.240 15.653
12.462 9.235
6.008 2.781
15.158 12.548
9.938 7.328
4.718 2.108
Planned Shipment-Receipt Date 15.604
15.604
Planed Shipments - Ship Date
15.604 15.604
Past Due Week
27 28
29 30
31 32
33 34
35 36
37 38
39 Demand Forecast
3.297 3.297
3.297 3.297
3.331 3.331
3.331 3.331
2.690 2.690
2.690 2.690
2.690
In Transit Projected on Hand
2.108 14.415
11.118 7.821
4.524 1.193
13.466 10.135
6.804 4.114
1.424 14.338
11.648 8.958
Planned Shipment-Receipt Date 15.604
15.604 15.604
Planed Shipments - Ship Date 15.604
15.604 15.604
Past Due Week
40 41
42 43
44 45
46 47
48 49
50 51
52 Demand Forecast
3.393 3.393
3.393 3.393
3.423 3.423
3.423 3.423
2.761 2.761
2.761 2.761
2.761
In Transit Projected on Hand
8.958 5.565
2.172 14.383
10.990 7.567
4.144 16.325
12.902 10.141
7.380 4.619
1.858 14.701
Planned Shipment-Receipt Date 15.604
15.604 15.604
Planed Shipments - Ship Date 15.604
15.604 15.604
Langkah-langkah pengisian Distribution Resources Planning Sheet untuk Dsitribution Centre Sibolga adalah :
1. On hand balance = 122 unit diperoleh dari tabel 5.3 2. Lead time = 10 jam diperoleh dari tabel 5.2
3. Order quantity = 7.314 unit diperoleh dari tabel 5.13 4. Safety stock = 323 unit diperoleh dari tabel 5.15
5. Projected on Hand Past Due = 122 unit diperoleh dari On hand Balance 6. Demands forecast 1
st
Week = 1.542 unit diperoleh dari tabel 5.16 7. In transit 1
st
Week = 0 unit 8. Planned shipments – Ship Date = 7.314 unit diperoleh dari Order Quantity
9. Planned shipments – Receipt Date = 7.314 unit diperoleh dari Order Quantity
10. Projected on hand 1
st
Week = Projected on Hand Past Due + Order quantity - Demands forecast 1
st
Week = 122 + 7.314 – 1.542 = 5.894 unit 11. Demands forecast 2
nd
Week = 1.542 unit diperoleh dari tabel 5.16 12. Projected on hand 2
nd
Week = Projected on hand 1
st
Week - Demands forecast 2
nd
Week = 5.894 – 1.542 = 4.352 unit 13. Demand forecast 3
rd
Week = 1.542 unit diperoleh dari tabel 5.16 14. Projected on hand 3
rd
Week = Projected on hand 2
nd
Week - Demand forecast 3
rd
Week = 4.352 – 1.542 = 2.810 unit 15. Dilakukan hal yang sama dengan proses yang sama untuk 52 minggu ke
depan sehingga Distribution Resources Planning Worksheet terisi secara keseluruhan.
Tabel 5.19. Distribution Resources Planning Worksheet untuk Distribution Centre Sibolga
Distribution Resources Planning Worksheet Sibolga On Hand Balance : 122
Lead Time : 10 hour = 0 week Safety Stock : 323
Order Quantity : 7.314 unit Distribution Centre : Sibolga
Past Due Week
1 2
3 4
5 6
7 8
9 10
11 12
13 Demand Forecast
1.542 1.542
1.542 1.542
1.538 1.538
1.538 1.538
1.226 1.226
1.226 1.226
1.226
In Transit Projected on Hand
122 5.894
4.352 2.810
1.268 7.044
5.506 3.968
2.430 1.204
7.292 6.066
4.840 3.614
Planned Shipment-Receipt Date 7.314
7.314 7.314
Planed Shipments - Ship Date 7.314
7.314 7.314
Past Due Week
14 15
16 17
18 19
20 21
22 23
24 25
26 Demand Forecast
1.525 1.525
1.525 1.525
1.516 1.516
1.516 1.516
1.203 1.203
1.203 1.203
1.203
In Transit Projected on Hand
3.614 2.089
564 6.353
4.828 3.312
1.796 7.594
6.078 4.875
3.672 2.469
1.266 7.377
Planned Shipment-Receipt Date 7.314
7.314 7.314
Planed Shipments - Ship Date 7.314
7.314 7.314
Past Due Week
27 28
29 30
31 32
33 34
35 36
37 38
39 Demand Forecast
1.491 1.491
1.491 1.491
1.476 1.476
1.476 1.476
1.167 1.167
1.167 1.167
1.167
In Transit Projected on Hand
7.377 5.886
4.395 2.904
1.413 7.251
5.775 4.299
2.823 1.656
489 6.636
5.469 4.302
Planned Shipment-Receipt Date 7.314
7.314
Planed Shipments - Ship Date 7.314
7.314
Past Due Week
40 41
42 43
44 45
46 47
48 49
50 51
52 Demand Forecast
1.440 1.440
1.440 1.440
1.419 1.419
1.419 1.419
1.117 1.117
1.117 1.117
1.117
In Transit Projected on Hand
4.302 2.862
1.422 7.296
5.856 4.437
3.018 1.599
7.494 6.377
5.260 4.143
3.026 1.909
Planned Shipment-Receipt Date
7.314 7.314
Planed Shipments - Ship Date 7.314
7.314
Langkah-langkah pengisian Distribution Resources Planning Sheet untuk Dsitribution Centre Medan adalah :
1. On hand balance = 60 unit diperoleh dari tabel 5.3 2. Lead time = 1 jam diperoleh dari tabel 5.2
3. Order quantity = 9.784 unit diperoleh dari tabel 5.13 4. Safety stock = 52 unit diperoleh dari tabel 5.15
5. Projected on Hand Past Due = 60 unit diperoleh dari On hand Balance 6. Demands forecast 1
st
Week = 3.507 unit diperoleh dari tabel 5.16 7. In transit 1
st
Week = 0 unit 8. Planned shipments – Ship Date = 9.784 unit diperoleh dari Order Quantity
9. Planned shipments – Receipt Date = 9.784 unit diperoleh dari Order Quantity
10. Projected on hand 1
st
Week = Projected on Hand Past Due + Order quantity - Demands forecast 1
st
Week = 60 + 9.784 – 3.507 = 6.337 unit 11. Demands forecast 2
nd
Week = 3.507 unit diperoleh dari tabel 5.16 12. Projected on hand 2
nd
Week = Projected on hand 1
st
Week - Demands forecast 2
nd
Week = 6.337 – 3.507 = 2.830 unit 13. Demand forecast 3
rd
Week = 3.507 unit diperoleh dari tabel 5.16 14. In transit 3
rd
Week = 0 unit 15. Planned shipments – Ship Date = 9.784 unit diperoleh dari Order Quantity
16. Planned shipments – Receipt Date = 9.784 unit diperoleh dari Order Quantity
17. Projected on hand 3
rd
Week = Projected on hand 2
nd
Week + Order Quantity - Demand forecast 3
rd
Week = 2.830 + 9.784 – 3.507 = 9.107 unit 18. Dilakukan hal yang sama dengan proses yang sama untuk 52 minggu ke
depan sehingga Distribution Resources Planning Worksheet terisi secara keseluruhan.
Tabel 5.20. Distribution Resources Planning Worksheet untuk Distribution Centre Medan
Distribution Resources Planning Worksheet Medan On Hand Balance : 60
Lead Time : 1 hour = 0 week Safety Stock : 52
Order Quantity : 9.784 unit Distribution Centre : Medan
Past Due Week
1 2
3 4
5 6
7 8
9 10
11 12
13 Demand Forecast
3.507 3.507
3.507 3.507
3.510 3.510
3.510 3.510
2.810 2.810
2.810 2.810
2.810
In Transit Projected on Hand
60 6.337
2.830 9.107
5.600 2.090
8.364 4.854
1.344 8.318
5.508 2.698
9.672 6.862
Planned Shipment-Receipt Date 9.784
9.784 9.784
9.784 9.784
Planed Shipments - Ship Date 9.784
9.784 9.784
9.784 9.784
Past Due Week
14 15
16 17
18 19
20 21
22 23
24 25
26 Demand Forecast
3.515 3.515
3.515 3.515
3.518 3.518
3.518 3.518
2.816 2.816
2.816 2.816
2.816
In Transit Projected on Hand
6.862 3.347
9.616 6.101
2.586 8.852
5.334 1.816
8.082 5.266
2.450 9.418
6.602 3.786
Planned Shipment-Receipt Date 9.784
9.784 9.784
9.784
Planed Shipments - Ship Date 9.784
9.784 9.784
9.784
Past Due Week
27 28
29 30
31 32
33 34
35 36
37 38
39 Demand Forecast
3.522 3.522
3.522 3.522
3.524 3.524
3.524 3.524
2.821 2.821
2.821 2.821
2.821
In Transit Projected on Hand
3.786 264
6.526 3.004
9.266 5.742
2.218 8.478
4.954 2.133
9.096 6.275
3.454 633
Planned Shipment-Receipt Date
9.784 9.784
9.784 9.784
Planed Shipments - Ship Date 9.784
9.784 9.784
9.784
Past Due Week
40 41
42 43
44 45
46 47
48 49
50 51
52 Demand Forecast
3.527 3.527
3.527 3.527
3.529 3.529
3.529 3.529
2.824 2.824
2.824 2.824
2.824
In Transit Projected on Hand
633 6.890
3.363 9.620
6.093 2.564
8.819 5.290
1.761 8.721
5.897 3.073
249 7.209
Planned Shipment-Receipt Date 9.784
9.784 9.784
9.784 9.784
Planed Shipments - Ship Date 9.784
9.784 9.784
9.784 9.784
Langkah-langkah pengisian Distribution Resources Planning Sheet untuk Dsitribution Centre Tebing Tinggi adalah :
1. On hand balance = 65 unit diperoleh dari tabel 5.3 2. Lead time = 2 jam diperoleh dari tabel 5.2
3. Order quantity = 2.285 unit diperoleh dari tabel 5.13 4. Safety stock = 127 unit diperoleh dari tabel 5.15
5. Projected on Hand Past Due = 65 unit diperoleh dari On hand Balance 6. Demands forecast 1
st
Week = 309 unit diperoleh dari tabel 5.16 7. In transit 1
st
Week = 0 unit 8. Planned shipments – Ship Date = 2.285 unit diperoleh dari Order Quantity
9. Planned shipments – Receipt Date = 2.285 unit diperoleh dari Order Quantity
10. Projected on hand 1
st
Week = Projected on Hand Past Due + Order quantity - Demands forecast 1
st
Week = 65 + 2.285 – 309 = 2.041 unit 11. Demands forecast 2
nd
Week = 309 unit diperoleh dari tabel 5.16 12. Projected on hand 2
nd
Week = Projected on hand 1
st
Week - Demands forecast 2
nd
Week = 2.041 – 309 = 1.732 unit 13. Demand forecast 3
rd
Week = 309 unit diperoleh dari tabel 5.16 14. Projected on hand 3
rd
Week = Projected on hand 2
nd
Week - Demand forecast 3
rd
Week = 1.732 – 309 = 1.423 unit 15. Dilakukan hal yang sama dengan proses yang sama untuk 52 minggu ke
depan sehingga Distribution Resources Planning Worksheet terisi secara keseluruhan.
Tabel 5.21. Distribution Resources Planning Worksheet untuk Distribution Centre Tebing Tinggi
Distribution Resources Planning Worksheet Tebing Tinggi On Hand Balance : 65
Lead Time : 2 hour = 0 week Safety Stock : 127
Order Quantity : 2.285 unit Distribution Centre :Tebing Tinggi
Past Due Week
1 2
3 4
5 6
7 8
9 10
11 12
13 Demand Forecast
309 309
309 309
306 306
306 306
242 242
242 242
242
In Transit Projected on Hand
65 2.041
1.732 1.423
1.114 808
502 196
2.175 1.933
1.691 1.449
1.207 965
Planned Shipment-Receipt Date 2.285
2.285
Planed Shipments - Ship Date 2.285
2.285
Past Due Week
14 15
16 17
18 19
20 21
22 23
24 25
26 Demand Forecast
299 299
299 299
295 295
295 295
232 232
232 232
232
In Transit Projected on Hand
965 666
367 2.353
2.054 1.759
1.464 1.169
874 642
410 178
2.231 1.999
Planned Shipment-Receipt Date 2.285
2.285
Planed Shipments - Ship Date 2.285
2.285
Past Due Week
27 28
29 30
31 32
33 34
35 36
37 38
39 Demand Forecast
285 285
285 285
279 279
279 279
218 218
218 218
218
In Transit Projected on Hand
1.999 1.714
1.429 1.144
859 580
301 2.307
2.028 1.810
1.592 1.374
1.156 938
Planned Shipment-Receipt Date 2.285
Planed Shipments - Ship Date 2.285
Past Due Week
40 41
42 43
44 45
46 47
48 49
50 51
52 Demand Forecast
266 266
266 266
259 259
259 259
201 201
201 201
201
In Transit Projected on Hand
938 672
406 140
2.159 1.900
1.641 1.382
1.123 922
721 520
319 2.403
Planned Shipment-Receipt Date
2.285 2.285
Planed Shipments - Ship Date 2.285
2.285
Langkah-langkah pengisian Distribution Resources Planning Sheet untuk Dsitribution Centre Siantar adalah :
1. On hand balance = 78 unit diperoleh dari tabel 5.3 2. Lead time = 3 jam diperoleh dari tabel 5.2
3. Order quantity = 2.393 unit diperoleh dari tabel 5.13 4. Safety stock = 50 unit diperoleh dari tabel 5.15
5. Projected on Hand Past Due = 78 unit diperoleh dari On hand Balance 6. Demands forecast 1
st
Week = 286 unit diperoleh dari tabel 5.16 7. In transit 1
st
Week = 0 unit 8. Planned shipments – Ship Date = 2.393 unit diperoleh dari Order Quantity
9. Planned shipments – Receipt Date = 2.393 unit diperoleh dari Order Quantity
10. Projected on hand 1
st
Week = Projected on Hand Past Due + Order quantity - Demands forecast 1
st
Week = 78 + 2.393 – 286 = 2.185 unit 11. Demands forecast 2
nd
Week = 286 unit diperoleh dari tabel 5.16 12. Projected on hand 2
nd
Week = Projected on hand 1
st
Week - Demands forecast 2
nd
Week = 2.185 – 286 = 1.899 unit 13. Demand forecast 3
rd
Week = 286 unit diperoleh dari tabel 5.16 14. Projected on hand 3
rd
Week = Projected on hand 2
nd
Week - Demand forecast 3
rd
Week = 1.899 – 286 = 1.613 unit 15. Dilakukan hal yang sama dengan proses yang sama untuk 52 minggu ke
depan sehingga Distribution Resources Planning Worksheet terisi secara keseluruhan.
Tabel 5.22. Distribution Resources Planning Worksheet untuk Distribution Centre Siantar
Distribution Resources Planning Worksheet Siantar On Hand Balance : 78
Lead Time : 3 hour = 0 week Safety Stock : 50
Order Quantity : 2.393 unit Distribution Centre : Siantar
Past Due Week
1 2
3 4
5 6
7 8
9 10
11 12
13 Demand Forecast
286 286
286 286
283 283
283 283
223 223
223 223
223
In Transit Projected on Hand
78 2.185
1.899 1.613
1.327 1.044
761 478
195 2.365
2.142 1.919
1.696 1.473
Planned Shipment-Receipt Date 2.393
2.393
Planed Shipments - Ship Date 2.393
2.393
Past Due Week
14 15
16 17
18 19
20 21
22 23
24 25
26 Demand Forecast
273 273
273 273
268 268
268 268
213 213
213 213
213
In Transit Projected on Hand
1.473 1.200
927 654
381 113
2.238 1.970
1.702 1.489
1.276 1.063
850 637
Planned Shipment-Receipt Date 2.393
Planed Shipments - Ship Date 2.393
Past Due Week
27 28
29 30
31 32
33 34
35 36
37 38
39 Demand Forecast
266 266
266 266
269 269
269 269
219 219
219 219
219
In Transit Projected on Hand
637 371
105 2.232
1.966 1.697
1.428 1.159
890 671
452 233
2.407 2.188
Planned Shipment-Receipt Date 2.393
2.393
Planed Shipments - Ship Date 2.393
2.393
Past Due Week
40 41
42 43
44 45
46 47
48 49
50 51
52 Demand Forecast
279 279
279 279
283 283
283 283
229 229
229 229
229
In Transit Projected on Hand
2.188 1.909
1.630 1.351
1.072 789
506 223
2.333 2.104
1.875 1.646
1.417 1.188
Planned Shipment-Receipt Date 2.393
Planed Shipments - Ship Date
2.393
Langkah-langkah pengisian Distribution Resources Planning Sheet untuk Dsitribution Centre Pekan Baru adalah :
1. On hand balance = 25 unit diperoleh dari tabel 5.3 2. Lead time = 32 jam diperoleh dari tabel 5.2
3. Order quantity = 9.900 unit diperoleh dari tabel 5.13 4. Safety stock = 54 unit diperoleh dari tabel 5.15
5. Projected on Hand Past Due = 25 unit diperoleh dari On hand Balance 6. Demands forecast 1
st
Week = 1.572 unit diperoleh dari tabel 5.16 7. In transit 1
st
Week = 0 unit 8. Planned shipments – Ship Date = 9.900 unit diperoleh dari Order Quantity
9. Planned shipments – Receipt Date = 9.900 unit diperoleh dari Order Quantity
10. Projected on hand 1
st
Week = Projected on Hand Past Due + Order quantity - Demands forecast 1
st
Week = 25 + 9.900 – 1.572 = 8.353 unit 11. Demands forecast 2
nd
Week = 1.572 unit diperoleh dari tabel 5.16 12. Projected on hand 2
nd
Week = Projected on hand 1
st
Week - Demands forecast 2
nd
Week = 8.353 – 1.572 = 6.781 unit 13. Demand forecast 3
rd
Week = 1.572 unit diperoleh dari tabel 5.16 14. Projected on hand 3
rd
Week = Projected on hand 2
nd
Week - Demand forecast 3
rd
Week = 6.781 – 1.572 = 5.209 unit 15. Dilakukan hal yang sama dengan proses yang sama untuk 52 minggu ke
depan sehingga Distribution Resources Planning Worksheet terisi secara keseluruhan.
Tabel 5.23. Distribution Resources Planning Worksheet untuk Distribution Centre Pekan Baru
Distribution Resources Planning Worksheet Pekan Baru On Hand Balance : 25
Lead Time : 32 hour = 0 week Safety Stock : 54
Order Quantity : 9.900 unit Distribution Centre : Pekan Baru
Past Due Week
1 2
3 4
5 6
7 8
9 10
11 12
13 Demand Forecast
1.572 1.572
1.572 1.572
1.570 1.570
1.570 1.570
1.254 1.254
1.254 1.254
1.254
In Transit Projected on Hand
25 8.353
6.781 5.209
3.637 2.067
497 8.827
7.257 6.003
4.749 3.495
2.241 987
Planned Shipment-Receipt Date 9.900
9.900
Planed Shipments - Ship Date 9.900
9.900
Past Due Week
14 15
16 17
18 19
20 21
22 23
24 25
26 Demand Forecast
1.565 1.565
1.565 1.565
1.563 1.563
1.563 1.563
1.249 1.249
1.249 1.249
1.249
In Transit Projected on Hand
987 9.322
7.757 6.192
4.627 3.064
1.501 9.838
8.275 7.026
5.777 4.528
3.279 2.030
Planned Shipment-Receipt Date 9.900
9.900
Planed Shipments - Ship Date 9.900
9.900
Past Due Week
27 28
29 30
31 32
33 34
35 36
37 38
39 Demand Forecast
1.559 1.559
1.559 1.559
1.556 1.556
1.556 1.556
1.243 1.243
1.243 1.243
1.243
In Transit Projected on Hand
2.030 471
8.812 7.253
5.694 4.138
2.582 1.026
9.370 8.127
6.884 5.641
4.398 3.155
Planned Shipment-Receipt Date 9.900
9.900
Planed Shipments - Ship Date 9.900
9.900
Past Due Week
40 41
42 43
44 45
46 47
48 49
50 51
52 Demand Forecast
1.552 1.552
1.552 1.552
1.550 1.550
1.550 1.550
1.238 1.238
1.238 1.238
1.238
In Transit Projected on Hand
3.155 1.603
9.951 8.399
6.847 5.297
3.747 2.197
647 9.309
8.071 6.833
5.595 4.357
Planned Shipment-Receipt Date 9.900
9.900
Planed Shipments - Ship Date 9.900
9.900
I-1 Pada tabel 5.17 sampai tabel 5.23 dapat dilihat DRP worksheet pada
setiap distribution centre dimana memperlihatkan sistem kegiatan perencanaan dan penjadwalan distribusi di distribution centre yang didasarkan pada peramalan.
DRP worksheet dilakukan untuk memperlihatkan secara detail dan jelas jumlah permintaan, safety stock, order quantity dan lead time. Order quantity
merupakan jumlah pengiriman produk yang optimal dan safety stock merupakan titik acuan pemesanan kembali produk.
5.2.7. Pegging Information
