Analisa sistem pengendalian persediaan bahan baku kayu lapis PT Kurnia Kapuas Plywood Industries & Co. Ltd. Pontianak - Kalimantan Barat

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ANALISA SISTEM PENGENDALIAN PERSEDIAAN BAHAN BAKU

KAYU LAPIS PT KURNIA KAPUAS PLYWOOD INDUSTRIES

&

GO.

LTDi

POAlTlANAK

-

KALIMANTAN BARAT

Oleh

RASMORO. PRAMONO AJI

F

22.

0501

I989

FAKULTAS TEKNOLOGI PERTANIAN

INSTITUT PERTANIAN

BOGOR

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Rasmoro Pramono A j i .

F

22.0501. A n a l i s a S i s t e m P e n g e n d a l i a n P e r s e d i a a n Bahan Baku Kayu L a p i s PT K u r n i a Kapuas Plywood

I n d u s t r i e s & Co. L t d . P o n t i a n a k - K a l i m a n t a n Barat. Dibawah

b i m b i n g a n I r Bambang Pramudya, M.Eng.

Pemasok kayu l a p i s d u n i a , k h u s u s n y a y a n g b e r a s a l d a r i

pohon kayu b e r d a u n l e b a r , d i m a n a k u r a n g l e b i h 70 p e r s e n b e r -

a s a l d a r i I n d o n e s i a , memerlukan p e r s i a p a n d a n p e n a n g a n a n y a n g

s e r i u s u n t u k masa s e k a r a n g d a n masa y a n g a k a n d a t a n g . S a l a h

s a t u u s a h a u n t u k m e n j a g a k e s i n a m b u n g a n p r o d u k s i kayu l a p i s

d i a n t a r a p a b r i k - p a b r i k kayu l a p i s d i I n d o n e s i a , a d a l a h d e n g a n

m e l a k u k a n p e n g e n d a l i a n p e r s e d i a a n h h a n baku kayu l a p i s t e r -

s e b u t .

M a s a l a h umum d a l a m s u a t u model p e n g e n d a l i a n p e r s e d i a a n

b e r s u m b e r d a r i k e j a d i a n - k e j a d i a n y a n g d i h a d a p i s e t i a p s a a t

d a l a m b i d a n g u s a h a , b a i k d i b i d a n g p e r d a g a n g a n maupun d i b i d a n g

i n d u s t r i . K e j a d i a n - k e j a d i a n t e r s e b u t d a p a t b e r u p a t e r s e d i a -

n y a b a h a n b a k u t e r l a l u b a n y a k a t a u mungkin j u g a b a k a n b a k u

y a n g t e r s e d i a t e r l a l u s e d i k i t u n t u k memenuhi p e r m i n t a a n l a n g -

g a n a n d i m a s a y a n g a k a n d a t a n g . A p a b i l a p e r s e d i a a n b a h a n b a k u

t e r l a l u b a n y a k d a l a m p e r s e d i a a n , maka p e r u s a h a a n t e r p a k s a

m e n d e r i t a b i a y a t a m b a h a n , s e p e r t i b i a y a p e r g u d a n g a n d a n l a i n -

l a i n . Demikian p u l a s e b a l i k n y a , a p a b i l a p e r s e d i a a n b a h a n

baku t e r l a l u s e d i k i t , a k a n mengganggu j a l a n n y a p r o s e s p r o d u k -

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Dengan m e l i h a t m o d e l d a n d i n a m i k a p e r s e d i a a n b a h a n b a k u

l o g u n t u k kayu l a p i s , maka m o d e l p e r s e d i a a n d a s a r y a n g s e s u a i

a d a l a h m o d e l u k u r a n l o t ( Q , P ) . Dengan m o d e l i n i d i l a k u k a n

p e n i n j a u a n s t a t u s p e r s e d i a a n p a d a i n t e r v a l w a k t u y a n g t e l a h

d i t e n t u k a n . A p a b i l a s t a t u s p e r s e d i a a n l e b i h k e c i l a t a u sama

d e n g a n t i t i k p e m e s a n a n k e m b a l i ( T p u )

,

maka d i l a k u k a n pemesan-

an s e b a n y a k t i n g k a t penambahan

Q ,

s e s u a i d e n g a n y a n g d i i n g i n -

k a n . S e b a l i k n y a a p a b i l a s t a t u s p e r s e d i a a n l e b i h b e s a r d a r i

t i t i k p e m e s a n a n k e m b a l i p a d a w a k t u p e n i n j a u a n y a n g d i i n g i n -

k a n , maka t i d a k d i l a k u k a n p e m e s a n a n b a h a n b a k u .

K a r e n a p e r m i n t a a n d a n w a k t u t u n g g u m e n g i k u t i s e b a r a n

p e l u a n g , maka p e l u a n g t e r j a d i k e k u r a n g a n b a h a n b a k u t e t a p

a d a , s e h i n g g a a l t e r n a t i f u n t u k m e m p e r k e c i l a t a u m e n i a d a k a n

p e l u a n g t e r j a d i n y a k e k u r a n g a n b a h a n baku d a p a t d i a t a s i d e n g a n

m e m p e r b e s a r t i n g k a t p e m e s a n a n .

Adapun a l t e r n a t i f p e n g a m b i l a n k e p u t u s a n y a n g o p t i m a l

d a r i s i m u l a s i i n i a d a l a h d e n g a n m e l a k u k a n p e s a n a n s e b e s a r

3200 m3 a p a b i l a p e r s e d i a a n d i l o g pond t e l a h m e n c a p a i t i t i k

2 0 0 0 m3, d e n g a n b i a y a r a t a - r a t a h a s i l s i m u l a s i s e b e s a r RP

1 8 1 0 2 3 8 , 7 2 s e t i a p h a r i .

S e d a n g k a n u n t u k p e r e k a t , k o m b i n a s i o p t i m a l t e r j a d i a p a -

b i l a b e s a r n y a p e s a n a n a d a l a h 7 0 0 0 0 kg p a d a s a a t p e r s e d i a a n d i

t a n g k i b e s a r n y a a d a l a h 50000 k g . Adapun b e s a r n y a b i a y a r a t a -

r a t a p e r s e d i a a n d a r i h a s i l s i m u l a s i y a n g d i l a k u k a n a d a l a h RP

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ANBLISA S I S T B n PENGENDALIAN PERSEDIAAN BAHAN BAKU

KAW L A P I S P T KURNIA KAPUAS PLYHOOD INDUSTRIES & CO. LTD.

PONTIANAK

-

KALIHANTAN BARAT

O l e h

RASMORO PRAMONO A J I

F 22.0501

S K R I P S I

S e b a g a i s a l a h s a t u s y a r a t u n t u k memperoleh g e l a r

SARJANA TEKNOLOGI PERTANIAN

p a d a J u r u s a n M e k a n i s a s i P e r t a n i a n

F a k u l t a s T e k n o l o g i P e r t m i a n

I n s t i t u t P e r t a n i a n Bogor

1989

INSTITUT PERTANIAN BOGOR

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INSTITUT PERTANIAN BOGOR

ANALISA SISTEW PENGENDALIAN PERSEDIAAN BBHAN BAKU

KAYU L A P I S P T KURNIA KAE'UAS PLYWOOD I N D U S T R I E S _& C O . L T D .

PONTIANAK

-

KALIWANTAN BARAT

S K R I P S I

S e b a g a i s a l a h s a t u s y a r a t u n t u k m e m p e r o l e h g e l a r

SARJANA TEKNOLOGI PERTANIAN

p a d a J u r u s a n M e k a n i s a s i P e r t a n i a n

F a k u l t a s T e k n o l o g i P e r t a n i a n

I n s t i t u t P e r t a n i a n Bogor

O l e h

RASMORO PRAMONO A J I

F 2 2 . 0 5 0 1

d i l a h i r k a n p a d a t a n g g a l 22 S e p t e m b e r 1 9 6 6

d i Ban j a r n e g a r a

T a n g g a l l u l u s :

18

m@%B

D i s e t u j u i ,

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KATA PENGANTAR

S y u k u r A l h a m d u l i l l a h p e n u l i s p a n j a t k a n k e h a d a p a n A l l a h

SWT., k a r e n a d e n g a n r a h m a t N y a l a h p e n u l i s d a p a t m e n y e l e s a i k a n

s k r i p s i i n i .

S k r i p s i i n i m e r u p a k a n s a l a h s a t u s y a r a t u n t u k m e m p e r o l e h

g e l a r S a r j m a p a d a j u r u s a n M e k a n i s a s i P e r t a n i a n ; Falru1ta.s

T e k n o l o g i P e r t a n i a n , I n s t i t u t P e r t a n i a n B o g o r .

Dalam k e s e m p a t a n i n i p e n u l i s mengucapkan t e r i m a k a s i h

y a n g t a k t e r h i n g g a k e p a d a :

1. I r . Banbang Pramudya.

M.

Eng.,

s e l a k u d o s e n pembimbing

2 . P i n p i n a n d a n s e l u r u h staf Bumi Raya U t a m a G r o u p

3. P i n p i n a n dan s e l u r n h staf PT K u r n i a K a p u a s P l m o o d

I n d u s t r i e s & Co. _{L t d .}

4 . Semua p i h a k y a n g t e l a h membantu t e r s u s u n n y a s k ~ i p s i i n i ,

y a n g d a l a m k e s e m p a t a n i n i t i d a k d a p a t p e n u l i s s e b u t k a n

s a t u p e r s a t u .

P e n u l i s m e n y a d a r i bahwa s k r i p s i i n i m a s i h j a u h d a r i

s e m p u r n a , o l e h k a r e n a i t u k r i t i k d a n s a r a n d a r i semua p i h a k

s a n g a t p e n u l i s h a r a p k a n .

A k h i r n y a , s e m o g a d i m a s a y a n g a k a n d a t a n g S k r i p s i i n i

d a p a t b e r g u n a b a g i y a n g m e m e r l u k a n n y a . Amin.

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DAFTAR

I S 1

halaman

KATA PENGANTAR

...

DAFTAR TABEL

...

DAFTAR GAMBAR

...

DAFTAR LAMPIRAN

...

I

.

PENDAHULUAN

...

A

.

LATAR BELAKANG

...

B

.

RUANG LINGKUP PERMASALAHAN

...

C

.

TUJUAN PENELITIAN

...

I1

.

SISTEM PRODUKSI KAYU LAPIS

...

A

.

KEADAAN UMUM

...

B

.

PROSES PEMBUATAN KAYU LAPIS

...

I11

.

LANDASAN TEORI

...

A

.

ANALISA SISTEM

...

B

.

TEORI PENGENDALIAN PERSEDIBAN

...

.

...

C

SIMULASI

D

.

PENCARIAN FAKTOR TUNGGAL

...

E

.

SEBARAN PELUANG

...

(8)

B

.

BAHAN BAKU YANG DIKENDALIKAN

...

71

C

.

PENGADAAN BAHAN BAKU

...

7

3

D

.

DINAMIKA SISTEM PERSEDIAAN BAHAN BAKU

. . . .

7

5

VI

.

ANALISA DAN PEMBAHASAN

...

7

8

A

.

ANALISA DATA

...

7

8

B

.

PEMBUATAN MODEL PERSEDIAAN

...

7 9

VII

.

KESIMPULAN DAN SARAN

...

94

A

.

KESIMPULAN

...

84

B

.

SARAN

...

95

LAMPIRAN

...

9 6

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DAFTAR TABEL

halaman

T a b e l I

.

S p e s i f i k a s i p e r e k a t t i p e I & I1

...

21

[image:9.612.112.547.162.640.2]

T a b e l 2

.

Campuran b a h a n y a n g d i p e r l u k a n u n t u k p e r e -

...

k a t t i p e I (WBP) 2 2

T a b e i 3

.

_{Campuran b a h a n y a n g d i p e r i u k a n u n t u k p e r e -}

...

k a t t i p e I1 ( W R ) 2 2

T a b e l 4

.

P e r e k a t t i p e I y a n g h a r u s d i b e r i k a n p a d a

. . .

kayu l a p i s 2 3

T a b e l 5

.

Banyaknya p e r e k a t t i p e

I1

y a n g h a r u s d i b e -

r i k a n p a d a kayu l a p i s

...

2 3

T a b e l 6

.

S e b a r a n f r e k u e n s i d a t a e k s p o n e n s i a l

...

5 8

T a b e l 7

.

S e b a r a n f r e k u e n s i d a t a e m p i r i s

...

6 1

T a b e l 8

.

S e b a r a n f r e k e n s i d a t a y a n g d i p e r b a i k i

....

6 2

T a b e l 9

.

P e m a k a i a n d a n n i l a i l o g kayu s e t i a p t a h u n -

n y a

...

7 2

T a b e l 1 0

.

P e m a k a i a n d a n n i l a i p e r e k a t s e t i a p t a h u n -

...

n y a 7 2

'$

.

T a b e l 11

.

P e m a k a i a n d a n n i l a i t e p u n g t e r i g u s e t l a p

...

t a h u n n y a 7 2

T a b e l 1 2

.

P e m a k a i a n d a n n i l a i hardener s e t i a p t a h u n -

n y a

...

7 3

T a b e l 1 3

.

Hasil u j i k e c u k u p a n d a t a

...

7 8

T a b e l 1 4

.

H a s i l u j i s e b a r a n n o r m a l

...

79

(10)

DAFTAR

GBHBAR

h a l a m a n

[image:10.612.121.547.159.646.2]

Gambar 1

.

Model u k u r a n l o t

(Q.

P )

...

3 5

Gambar 2

.

Model penambahan

...

3 5

Gambar 3

.

_{Model penambahan o p s i o n a l}

...

36

Gambar 4

.

Skema s i m u l a s i p r o b a b i l i s t i k

...

4 4

Gambar 5

.

P u n g s i k e p a d a t a n p e l u a n g u n t u k d i s t r i b u s i

s e l a r a s

. . .

4 5

Gambar 6

.

P r o s e s p e l a k s a n a a n

...

5 1

Gambar 7

.

Metode p e n c a r i a n f a k t o r t u n g g a l

. . .

53

Gambar 8

.

Diagram i n p u t o u t p u t s i s t e m p e n g e n d a l i a n

p e r s e d i a a n b a h a n b a k u

...

6 8

Gambar 9

.

Diagram s e b a b a k i b a t p a d a p e n g e n d a l i a n

p e r s e d i a a n b a h a n b a k u

. . .

6 9

Gambar 1 0

.

Model sistem p e r s e d i a a n

...

83

Gambar 11

.

D a t a p e n g e n d a l i a n p e r s e d i a a n l o g kayu s e -

...

lama b u l a n Desember 1 9 8 8 8 4

Gambar 12

.

Hasil s i m u l a s i p e n g e n d a l i a n p e r s e d i a a n l o g

. . .

kayu s e l a m a 30 h a r i 8 4

Gambar 13

.

D a t a p e n g e n d a l i a n p e r s e d i a a n p e r e k a t s e -

...

lama b u l a n Desember 1 9 8 8 8 5

Gambar 1 4

.

Hasil s i m u l a s i p e n g e n d a l i a n p e r s e d i a a n p e -

r e k a t s e l a m a 3 0 h a r i

. . .

8 5

Gambar 1 5

.

Diagram a l i r s i m u l a s i p e n g e n d a l i a n p e r s e -

. . .

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