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Lampiran 2 Layout Pabrik PT. Harapan Widyatama .85 Lampiran 2 Layout Pabrik PT. Harapan Widyatama

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85

Lampiran 2

Layout Pabrik PT. Harapan Widyatama Pertiwi

RuangCrasher

(pipabesar)

WORKSHOP

GenzetCompresorMixer

Maintenance Ruang Crasher(untuk pipa kecil)

War

ehou

se

Bah

an B

aku

Resi

n

Bahan BakuHDPE

Gedung Lama(sedang direhabilitasi)

Stabilizer ToolCribs

PRONT45

EXC45

CMT45

FANGLI

EXC92

Batenfield

EXC58

CMT58

CMT68

CMTM68`

CMTS68

CMS45

ALPHA60

PROTON60

CMS75

SHEETLINE

EXC 80PLANT

PVC

TWISIC

PROTON120

EXC80

86

Lampiran 3

Peta Proses Operasi Pipa SNI S12,5 63

87

Lampiran 4

Peta Proses Operasi Pipa PVC Abu AW 1

88

Lampiran 5

Pola Data Permintaan Pipa PVC SNI S12,5 63

0

1000

2000

3000

4000

5000

6000

7000

8000

1 2 3 4 5 6 7 8 9 1011121314151617181920212223242526272829303132333435Periode

Bat

ang

Lampiran 6

Pola Data Permintaan Pipa PVC Abu AW 1

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

1 2 3 4 5 6 7 8 9 1011121314151617181920212223242526272829303132333435Periode

Bat

ang

89

Lampiran 7

Metode Peramalan Yang Digunakan

Metode Peramalan Parameter Double Exponential Smoothing

= 0.1, = 0.2 = 0.2, = 0.3 = 0.3, = 0.4 = 0.4, = 0.5 = 0.5, = 0.6 = 0.6, = 0.7

2 parameter dari Holt

= 0.7, = 0.8 Triple Exponential Smoothing

= 0.1, = 0.2, = 0.3 = 0.2, = 0.3, = 0.4 = 0.3, = 0.4, = 0.5 = 0.4, = 0.5, = 0.6 = 0.5, = 0.6, = 0.7 = 0.6, = 0.7, = 0.8

3 parameter dari Winters

= 0.7, = 0.8, = 0.9 Multiplicative Dekomposisi Additive Dekomposisi Trend Regresi Linear

90

Exponential Smoothing Holt Data demand Length 35 Smoothing Constants Alpha (level) 0.1 Gamma (trend) 0.2 Accuracy Measures MAPE 45 MAD 1299 MSD 2704529 Time demand Smooth Predict Error 1 1655 3057.71 3213.56 -1558.56 2 3151 3045.48 3033.75 117.25 3 4162 3137.68 3023.87 1138.13 4 3254 3150.35 3138.83 115.17 5 2524 3090.83 3153.81 -629.81 6 4515 3225.02 3081.69 1433.31 7 2988 3218.89 3244.55 -256.55 8 4544 3364.36 3233.29 1310.71 9 6462 3710.67 3404.97 3057.03 10 5567 3987.88 3812.42 1754.58 11 3461 4058.35 4124.72 -663.72 12 4487 4212.43 4181.92 305.08 13 2750 4182.89 4342.10 -1592.10 14 1450 3997.64 4280.72 -2830.72 15 1806 3815.57 4038.86 -2232.86 16 2484 3679.31 3812.13 -1328.13 17 1715 3455.88 3649.31 -1934.31 18 2178 3266.27 3387.19 -1209.19 19 2802 3136.25 3173.39 -371.39 20 4562 3188.55 3035.95 1526.05 21 3325 3139.39 3118.77 206.23 22 1495 2915.86 3073.73 -1578.73 23 1907 2727.47 2818.63 -911.63 24 2165 2567.30 2612.00 -447.00 25 2293 2427.90 2442.89 -149.89 26 2940 2364.45 2300.50 639.50 27 5295 2554.35 2249.84 3045.16 28 3273 2577.88 2500.64 772.36 29 1602 2445.85 2539.62 -937.62 30 2528 2402.76 2388.84 139.16 31 4556 2569.27 2348.52 2207.48 32 5847 2887.97 2559.19 3287.81 33 6965 3345.78 2943.64 4021.36 34 3821 3515.79 3481.88 339.12 35 2240 3516.81 3658.67 -1418.67 Forecasts Period Forecast 36 3631.32 37 3745.83 38 3860.34

91

Exponential Smoothing Holt Data demand Length 35 Smoothing Constants Alpha (level) 0.2 Gamma (trend) 0.3 Accuracy Measures MAPE 47 MAD 1357 MSD 2759127 Time demand Smooth Predict Error 1 1655 2901.85 3213.56 -1558.56 2 3151 2882.64 2815.55 335.45 3 4162 3085.58 2816.47 1345.53 4 3254 3130.91 3100.14 153.86 5 2524 3028.56 3154.71 -630.71 6 4515 3314.61 3014.52 1500.48 7 2988 3310.07 3390.59 -402.59 8 4544 3598.32 3361.90 1182.10 9 6462 4269.26 3721.07 2740.93 10 5567 4758.57 4556.46 1010.54 11 3461 4777.33 5106.41 -1645.41 12 4487 4918.55 5026.44 -539.44 13 2750 4658.24 5135.30 -2385.30 14 1450 4075.50 4731.87 -3281.87 15 1806 3522.97 3952.21 -2146.21 16 2484 3113.53 3270.92 -786.92 17 1715 2594.41 2814.26 -1099.26 18 2178 2218.95 2229.18 -51.18 19 2802 2040.92 1850.65 951.35 20 4562 2296.16 1729.70 2832.30 21 3325 2388.91 2154.88 1170.12 22 1495 2153.27 2317.84 -822.84 23 1907 2007.66 2032.83 -125.83 24 2165 1936.74 1879.67 285.33 25 2293 1919.29 1825.87 467.13 26 2940 2057.16 1836.45 1103.55 27 5295 2691.42 2040.53 3254.47 28 3273 2950.65 2870.06 402.94 29 1602 2843.17 3153.46 -1551.46 30 2528 2867.92 2952.90 -424.90 31 4556 3272.92 2952.15 1603.85 32 5847 3932.11 3453.38 2393.62 33 6965 4797.95 4256.19 2708.81 34 3821 4991.85 5284.56 -1463.56 35 2240 4760.51 5390.64 -3150.64 Forecasts Period Forecast 36 4970.27 37 5180.03 38 5389.79

92

Exponential Smoothing Holt Data demand Length 35 Smoothing Constants Alpha (level) 0.3 Gamma (trend) 0.4 Accuracy Measures MAPE 50 MAD 1416 MSD 2910741 Time demand Smooth Predict Error 1 1655 2745.99 3213.56 -1558.56 2 3151 2741.63 2566.18 584.82 3 4162 3091.00 2632.00 1530.00 4 3254 3191.68 3164.97 89.03 5 2524 3050.63 3276.33 -752.33 6 4515 3486.00 3045.00 1470.00 7 2988 3456.14 3656.77 -668.77 8 4544 3845.86 3546.66 997.34 9 6462 4777.84 4056.06 2405.94 10 5567 5363.83 5276.76 290.24 11 3461 5166.60 5897.57 -2436.57 12 4487 5131.67 5407.95 -920.95 13 2750 4508.75 5262.51 -2512.51 14 1450 3471.66 4338.09 -2888.09 15 1806 2609.90 2954.43 -1148.43 16 2484 2113.60 1954.86 529.14 17 1715 1579.94 1522.05 192.95 18 2178 1361.48 1011.54 1166.46 19 2802 1493.74 933.06 1868.94 20 4562 2271.32 1289.60 3272.40 21 3325 2719.40 2459.86 865.14 22 1495 2556.73 3011.76 -1516.76 23 1907 2439.06 2667.08 -760.08 24 2165 2370.24 2458.19 -293.19 25 2293 2335.83 2354.19 -61.19 26 2940 2500.71 2312.45 627.55 27 5295 3375.34 2552.63 2742.37 28 3273 3611.34 3756.34 -483.34 29 1602 3234.64 3934.34 -2332.34 30 2528 3052.83 3277.76 -749.76 31 4556 3470.99 3005.98 1550.02 32 5847 4281.20 3610.14 2236.86 33 6965 5371.64 4688.77 2276.23 34 3821 5382.95 6052.36 -2231.36 35 2240 4729.14 5795.91 -3555.91 Forecasts Period Forecast 36 4715.39 37 4701.64 38 4687.89

93

Exponential Smoothing Holt Data demand Length 35 Smoothing Constants Alpha (level) 0.4 Gamma (trend) 0.5 Accuracy Measures MAPE 53 MAD 1495 MSD 3135473 Time demand Smooth Predict Error 1 1655 2590.14 3213.56 -1558.56 2 3151 2631.79 2285.64 865.36 3 4162 3165.02 2500.36 1661.64 4 3254 3321.15 3365.92 -111.92 5 2524 3109.40 3499.67 -975.67 6 4515 3661.67 3092.79 1422.21 7 2988 3552.90 3929.50 -941.50 8 4544 3997.06 3632.43 911.57 9 6462 5140.14 4258.90 2203.10 10 5567 5732.36 5842.60 -275.60 11 3461 5212.22 6379.70 -2918.70 12 4487 4960.29 5275.82 -788.82 13 2750 4019.68 4866.13 -2116.13 14 1450 2681.37 3502.29 -2052.29 15 1806 1774.52 1753.53 52.47 16 2484 1507.90 857.16 1626.84 17 1715 1235.55 915.91 799.09 18 2178 1353.23 803.38 1374.62 19 2802 1838.39 1195.98 1606.02 20 4562 3026.21 2002.35 2559.65 21 3325 3551.26 3702.10 -377.10 22 1495 3089.04 4151.73 -2656.73 23 1907 2657.70 3158.16 -1251.16 24 2165 2351.95 2476.59 -311.59 25 2293 2182.32 2108.53 184.47 26 2940 2361.47 1975.78 964.22 27 5295 3526.67 2347.78 2947.22 28 3273 3770.65 4102.42 -829.42 29 1602 3149.11 4180.52 -2578.52 30 2528 2837.17 3043.28 -515.28 31 4556 3399.37 2628.28 1927.72 32 5847 4484.41 3576.02 2270.98 33 6965 5855.16 5115.26 1849.74 34 3821 5641.97 6855.95 -3034.95 35 2240 4517.47 6035.78 -3795.78 Forecasts Period Forecast 36 4152.12 37 3786.77 38 3421.42

94

Exponential Smoothing Holt Data demand Length 35 Smoothing Constants Alpha (level) 0.5 Gamma (trend) 0.6 Accuracy Measures MAPE 56 MAD 1561 MSD 3317461 Time demand Smooth Predict Error 1 1655 2434.28 3213.56 -1558.56 2 3151 2562.46 1973.93 1177.07 3 4162 3308.62 2455.23 1706.77 4 3254 3483.71 3713.42 -459.42 5 2524 3137.34 3750.68 -1226.68 6 4515 3775.66 3036.31 1478.69 7 2988 3553.12 4118.23 -1130.23 8 4544 4050.31 3556.62 987.38 9 6462 5406.02 4350.03 2111.97 10 5567 5953.16 6339.33 -772.33 11 3461 5057.89 6654.78 -3193.78 12 4487 4644.18 4801.37 -314.37 13 2750 3521.68 4293.35 -1543.35 14 1450 2078.

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