A. Produk FL
Persediaan Pengaman = MAD x Faktor Pengaman = 24.6875 Pallet x 2.06
= 51
Pallet B.
Produk DHFL Persediaan Pengaman = MAD x Faktor Pengaman
= 34.16181 Pallet x 2.06 = 77 Pallet
Perhitungan Safety Stock untuk masing-masing distributor selengkapnya dapat dilihat pada lampiran F. Untuk hasil akhir dari perhitungan Safety Stock
pada setiap Distributor disajikan pada Tabel 4.34.
Tabel 4. 34. Tingkat Safety Stock Masing-Masing Distributor Pallet
Safety Stock SS PRODUK SURABAYA
SEMARANG BANDUNG
JATINEGARA FL 51
59 104 101 DHFL 77
79 48
90
Sumber : Pengolahan Data
Dari tabel Surabaya Produk FL sebesar 51 Pallet, produk DHFL sebesar 77 Pallet, dan begitu seterusnya untuk distributor yang lain.
4.2.9. Perencanaan Distribusi Metode DRP Hasil Peramalan
DRP masing-masing agen seperti yang tertera pada Lampiran I. diperoleh berdasarkan hasil peramalan pada masing-masing Distributor. Untuk DRP pada
bulan Januari 2009 Distributor Surabaya sebagai berikut :
Tabel 4. 35. DRP Distributor Surabaya Bulan Januari-Desember 2010 Jenis Produk FL Pallet
Project On Hand :
29 Lead Time :
1 EOQ
: 52
Safety Stock
: 51
Past Januari
Pebruari Maret
Period Due
1 2
3 4
5 6
7 8
9 10
11 12
13
Gross Requirements 43 43 43 43 43 53 53 53 53 53 53 53 53
Scheduled Receipts Projected
On-hand 29 38 47 55 64 73 71 69 68 66 64 62 60 58
Net Requirements
65 56 47 38 29 31 33 35 37 38 40 42 44 Planned
Order Receipts
52 52 52 52 52 52 52 52 52 52 52 52 52 Planned
Order Releases
52 52 52 52 52 52 52 52 52 52 52 52 52 52
Past April
Mei Juni
Period Due
14 15
16 17
18 19
20 21
22 23
24 25
26
Gross Requirements 43 43 43 43 43 53 53 53 53 53 53 53 53
Scheduled Receipts Projected
On-hand 58 67 76 85 94 51 49 47 46 44 42 40 38 36
Net Requirements
35 26 17 9 53 55 57 59 60 62 64 66
Planned Order
Receipts 52 52 52 52
52 52 52 52 52 52 52 52 Planned
Order Releases
52 52 52 52 0 52 52 52 52 52 52 52 52 52
Past Juli
Agustus September
Period Due
27 28
29 30
31 32
33 34
35 36
37 38
39
Gross Requirements 43 43 43 43 43 53 53 53 53 43 43 43 43
Scheduled Receipts Projected
On-hand 36 45 54 63 72 81 79 77 75 73 82 91 100 57
Net Requirements
57 48 39 31 22 24 25 27 29 20 11 3 Planned
Order Receipts
52 52 52 52 52 52 52 52 52 52 52 52 Planned
Order Releases
52 52 52 52 52 52 52 52 52 52 52 52 0 52
Past Oktober
Nopember Desember
Period Due
40 41
42 43
44 45
46 47
48 49
50 51
52
Gross Requirements 43 53 53 53 53 53 53 53 53 53 53 53 53
Scheduled Receipts Projected
On-hand 57 66 64 62 60 59 57 55 53 51 49 48 46 44
Net Requirements
36 38 40 42 44 46 47 49 51 53 55 57 58 Planned
Order Receipts
52 52 52 52 52 52 52 52 52 52 52 52 52 Planned
Order Releases
52 52 52 52 52 52 52 52 52 52 52 52 52 52 Frekuensi Pemesanan
: 50
kali pesan Jumlah Persediaan
: 2,512
unit Biaya Pesan
: Rp.
2,074,000.00 Biaya Simpan
: Rp.
77000.00 Total Cost
= Ordering Cost + Holding Cost
= Frekuensi Pemesanan x Biaya Pesan + Jumlah Persediaan x Biaya Simpan
= 50
x Rp. 2,074,000.00
+ 2,512
x 77,000.000
= Rp.
103,700,000.00 +
Rp. 193,424,000.00
= 297124000.00
Project On
Hand :
24 Lead
Time :
1 EOQ
: 52
Safety Stock : 77
Past Januari
Pebruari Maret
Period Due
1 2
3 4
5 6
7 8
9 10
11 12
13
Gross Requirements 34 34 34 34 34 43 43 43 43 43 43 43 43
Scheduled Receipts Projected
On-hand 24 41 58 75 92 110 118 127 84 92 101 109 118 126
Net Requirements
87 70 53 36 19 10 2 36 28 19 11 2
Planned Order
Receipts 52 52 52 52 52 52 52
52 52 52 52 52 Planned
Order Releases 52 52 52 52 52 52 52 0 52 52 52 52 52 52
April Mei
Juni Period
Due 14
15 16
17 18
19 20
21 22
23 24
25 26
Gross Requirements 34 34 34 34 34 43 43 43 43 43 43 43 43
Scheduled Receipts Projected
On-hand 126 92 109 126 92 109 117 126 83 91 100 108 117 125
Net Requirements 19
2 20
11 3
37 29
20 12
3 Planned Order Receipts
52 52
52 52
52 52
52 52
52 52
Planned Order
Releases 52 52 52 0 52 52 52 0 52 52 52 52 52 0
Past Juli
Agustus September
Period Due
27 28
29 30
31 32
33 34
35 36
37 38
39
Gross Requirements 34 34 34 34 34 43 43 43 43 34 34 34 34
Scheduled Receipts Projected
On-hand 125 91 108 125 91 108 116 125 82 90 107 125 90 107
Net Requirements 20
3 21
12 4
38 21
4 21
Planned Order Receipts 52
52 52
52 52
52 52
52 52
Planned Order
Releases 52 52 52 0 52 52 52 0 52 52 52 0 52 52
Past Oktober
Nopember Desember
Period Due
40 41
42 43
44 45
46 47
48 49
50 51
52
Gross Requirements 34 43 43 43 43 43 43 43 43 43 43 43 43
Scheduled Receipts Projected
On-hand 107
124 81 90 98 107 115
124 81 89 98 106 115 123
Net Requirements 4
38 30
21 13
4 39
30 22
13 5
Planned Order Receipts 52
52 52
52 52
52 52
52 52
52 52
Planned Order
Releases 52 0 52 52 52 52 52 0 52 52 52 52 52 52 Frekuensi Pemesanan
: 43
kali pesan Jumlah Persediaan
: 2,761
unit Biaya Pesan
: Rp. 2,074,000.00
Biaya Simpan :
Rp. 62000.00
Total Cost =
Ordering Cost + Holding Cost =
Frekuensi Pemesanan x Biaya Pesan + Jumlah Persediaan x Biaya Simpan =
43 X
Rp. 2,074,000.00 +
2,761 x
62,000.000 =
Rp. 89,182,000.00 +
Rp. 171,182,000.00
= 260364000
Tabel 4. 36. DRP Distributor Surabaya Bulan Januari-Desember 2010 Jenis Produk DHFL Pallet
Hasil pengolahan DRP bulan Januari-Desember 2010 masing-masing Distributor dan produk yang berupa total kapasitas pelepasan order planned
order releases menjadi kebutuhan kotor Gross Requirement dari DRP Pusat. Hasil Distribution Requirement Planning DRP untuk Distributor yang lain
dapat dilihat pada Lampiran I.
4.2.10. Pembuatan Total Kebutuhan Seluruh Produk
