HALAMAN JUDUL LEMBAR PERSETUJUAN PEMBIMBING LEMBAR PENGESAHAN PENGUJI HALAMAN PERSEMBAHAN HALAMAN MOTTO KATA PENGANTAR DAFTAR ISI

DAFTAR ISI

HALAMAN JUDUL ................................................................................... i LEMBAR PERSETUJUAN PEMBIMBING............................................ii LEMBAR PENGESAHAN PENGUJI ..................................................... iii HALAMAN PERSEMBAHAN ................................................................. iv HALAMAN MOTTO ................................................................................. vi KATA PENGANTAR ................................................................................ vii DAFTAR ISI ............................................................................................... x DAFTAR TABEL ....................................................................................... xii DAFTAR GAMBAR .................................................................................. xiii DAFTAR LAMPIRAN .............................................................................. xvi PERNYATAAN .......................................................................................... xvii INTISARI .................................................................................................... xviii ABSTRACK ................................................................................................ xix

BAB I

BAB II

PENDAHULUAN ............................................................... 1 1.1

Latar Belakang .......................................................... 1

1.2

Rumusan Masalah .................................................... 4

1.3

Batasan Masalah........................................................ 5

1.4

Tujuan Penelitian....................................................... 5

1.5

Manfaat Penelitian..................................................... 6

DASAR TEORI .................................................................. 7 2.1

Kualitas...................................................................... 7

2.2

Pengendalian Kualitas Statistik................................. 8

2.3

Peta Kendali/Grafik Pengendali................................ 13

2.4

Peta Kendali/Grafik Pengendali Variabel..................14

2.5

Peta Kendali/Grafik Pengendali Rata-Rata ( X ) dan Standar Deviasi (S).................................................... 21

2.6

BAB III

BAB IV

BAB V

Analisis Kemampuan Proses......................................26

METODOLOGI PENELITIAN ………………………… 32 3.1

Populasi Sasaran…………………………………… 32

3.2

Subjek Penelitian…………………………………... 32

3.3

Sumber Data………………………………………...33

3.4

Variabel Penelitian…………………………………. 34

3.5

Metode Analisis Data……………………………… 34

ANALISIS DAN PEMBAHASAN………………………. 35 4.1

Dump Truck Tipe 777C……………………………. 35

4.2

Dump Truck tipe 777D.............................................. 51

4.3

Dump Truck tipe HD785 .......................................... 69

PENUTUP ........................................................................... 92 5.1

Kesimpulan ............................................................... 92

5.2

Saran ......................................................................... 93

DAFTAR PUSTAKA RINGKASAN TUGAS AKHIR LAMPIRAN

DAFTAR TABEL

Tabel 2.1 Check Sheet Untuk Banyaknya Kesalahan.............................................10 Tabel 4.1 Nilai Rata-rata ( X ) dan Standar Deviasi (S) untuk

Berat Muatan Dump Truck Tipe 777C (Januari,dalam ton)....................35 Tabel 4.2 Nilai Rata-rata ( X ) dan Standar Deviasi (S) untuk

Berat Muatan Dump Truck Tipe 777C (Februari,dalam ton)..................43 Tabel 4.3 Nilai Rata-rata ( X ) dan Standar Deviasi (S) untuk

Berat Muatan Dump Truck Tipe 777D (Januari,dalam ton)....................52 Tabel 4.4 Nilai Rata-rata ( X ) dan Standar Deviasi (S) untuk

Berat Muatan Dump Truck Tipe 777D (Februari,dalam ton)..................60 Tabel 4.5 Nilai Rata-rata ( X ) dan Standar Deviasi (S) untuk

Berat Muatan Dump Truck Tipe HD785 (Januari,dalam ton).................69 Tabel 4.6 Nilai Rata-rata ( X ) dan Standar Deviasi (S) untuk

Berat Muatan Dump Truck Tipe HD785 (Februari,dalam ton)...............80

DAFTAR GAMBAR

Gambar 2.1

Diagram Pencar......................................................................................9

Gambar 2.2

Histogram.............................................................................................10

Gambar 2.3

Diagram Pareto.....................................................................................11

Gambar 2.4

Run Chart..............................................................................................11

Gambar 2.5

Grafik Pengendali ................................................................................12

Gambar 2.6

Diagram Sebab Akibat….……………………………………..……..12

Gambar 2.7

Model Umum......................................................................................17

Gambar 2.8

Model yang Berubah Secara Mendadak………………………….....18

Gambar 2.9

Model Perubahan Bertahap………………………………................18

Gambar 2.10 Model Trend……………………………………………………….. 19 Gambar 2.11 Model Siklus……………………………………………………….. 19 Gambar 2.12 Model Tidak Beraturan…………………………………………….. 20 Gambar 2.13 Model Tidak Beraturan……………………………………………. .20 Gambar 2.14 Model Campuran…………………………………………………....20 Gambar 2.15 Model Stratifikasi…………………………………………………....21 Gambar 2.16 Lebar Spesifikasi………………………………………………….…26 Gambar 2.17 Cp = 1………………………………………………………………...27 Gambar 2.18 Cp < 1………………………………………………………………...28 Gambar 2.19 Cp > 1………………………………………………………………...28 Gambar 2.20 Cpk Negatif…………………………………………………………...29 Gambar 2.21 Cpk = 0……………………………………………………………….30 Gambar 2.22 Cpk antara 0 dan 1................................................................................30 Gambar 2.23 Cpk = 1……………………………………………………………......30 Gambar 2.24 Cpk > 1………………………………………………………………..31 Gambar 3.1

Dump Truck Tipe 777C……………………………………………...32

Gambar 3.2

Dump Truck Tipe 777D……………………………………………...33

Gambar 3.3

Dump Truck Tipe HD785…………………………………………....33

Gambar 4.1

Run Chart Dump Truck Tipe 777C (Januari)………………………..38

Gambar 4.2

Peta Kendali S Dump Truck Tipe 777C (Januari)…………………...38

Gambar 4.3

Peta Kendali X Dump Truck Tipe 777C (Januari)............................39

Gambar 4.4

Peta Kendali S Dump Truck Tipe 777C (Januari-Revisi1).................40

Gambar 4.5

Peta Kendali X Dump Truck Tipe 777C (Januari-Revisi1)...............40

Gambar 4.6

Analisis Kemampuan Proses Dump Truck Tipe 777C (Januari).........42

Gambar 4.7

Run Chart Dump Truck Tipe 777C (Februari)....................................45

Gambar 4.8

Peta Kendali S Dump Truck Tipe 777C (Februari).............................46

Gambar 4.9

Peta Kendali S Dump Truck Tipe 777C (Februari-Revisi1)...............47

Gambar 4.10 Peta Kendali X Dump Truck Tipe 777C (Februari)..........................48 Gambar 4.11 Peta Kendali S Dump Truck Tipe 777C (Februari-Revisi2)...............49 Gambar 4.12 Peta Kendali X Dump Truck Tipe 777C (Februari-Revisi)...............49 Gambar 4.13 Analisis Kemampuan Proses Dump Truck Tipe 777C (Februari).......50 Gambar 4.14 Run Chart Dump Truck Tipe 777D (Januari)......................................54 Gambar 4.15 Peta Kendali S Dump Truck Tipe 777D (Januari)............................. .55 Gambar 4.16 Peta Kendali S Dump Truck Tipe 777D (Januari-Revisi1) ............... 56 Gambar 4.17 Peta Kendali X Dump Truck Tipe 777D (Januari)............................57 Gambar 4.18 Peta Kendali S Dump Truck Tipe 777D (Januari-Revisi2) ............... 58 Gambar 4.19 Peta Kendali X Dump Truck Tipe 777D (Januari-Revisi1)............. 58 Gambar 4.20 Analisis Kemampuan Proses Dump Truck Tipe 777D (Januari)........59 Gambar 4.21 Run Chart Dump Truck Tipe 777D (Februari)...................................63 Gambar 4.22 Peta Kendali S Dump Truck Tipe 777D (Februari)............................64 Gambar 4.23 Peta Kendali S Dump Truck Tipe 777D (Februari-Revisi1)...............65 Gambar 4.24 Peta Kendali X Dump Truck Tipe 777D (Februari)..........................65 Gambar 4.25 Peta Kendali S Dump Truck Tipe 777D (Februari-Revisi2)...............66 Gambar 4.26 Peta Kendali X Dump Truck Tipe 777D (Februari-Revisi1)............67

Gambar 4.27 Analisis Kemampuan Proses Dump Truck Tipe 777D (Februari)......68 Gambar 4.28 Run Chart Dump Truck Tipe HD785 (Januari)...................................72 Gambar 4.29 Peta Kendali S Dump Truck Tipe HD785 (Januari)............................72 Gambar 4.30 Peta Kendali S Dump Truck Tipe HD785 (Januari-Revisi1)..............73 Gambar 4.31 Peta Kendali X Dump Truck Tipe HD785 (Januari).........................74 Gambar 4.32 Peta Kendali S Dump Truck Tipe HD785 (Januari-Revisi2)..............75 Gambar 4.33 Peta Kendali X Dump Truck Tipe HD785 (Januari-Revisi1)............76 Gambar 4.34 Peta Kendali S Dump Truck Tipe HD785 (Januari-Revisi3)..............77 Gambar 4.35 Peta Kendali X Dump Truck Tipe HD785 (Januari-Revisi2)............77 Gambar 4.36 Analisis Kemampuan Proses Dump Truck Tipe HD785 (Januari)......78 Gambar 4.37 Run Chart Dump Truck Tipe HD785 (Februari)…………………….82 Gambar 4.38 Peta Kendali S Dump Truck Tipe HD785 (Februari)…………….….83 Gambar 4.39 Peta Kendali S Dump Truck Tipe HD785 (Februari-Revisi1)............84 Gambar 4.40 Peta Kendali X Dump Truck Tipe HD785 (Februari)……………...84 Gambar 4.41 Peta Kendali S Dump Truck Tipe HD785 (Februari-Revisi2)............85 Gambar 4.42 Peta Kendali X Dump Truck Tipe HD785 (Februari-Revisi1)..........86 Gambar 4.43 Peta Kendali S Dump Truck Tipe HD785 (Februari-Revisi3) ..........87 Gambar 4.44 Peta Kendali X Dump Truck Tipe HD785 (Februari-Revisi2)..........87 Gambar 4.45 Analisis Kemampuan Proses Dump Truck Tipe HD785 (Februari)....88 Gambar 4.46 Diagram Sebab Akibat Penyimpangan Berat Muatan ........................91

DAFTAR LAMPIRAN

Lampiran 1. Data Berat Muatan Dump Truck Tipe 777C............................................1 Lampiran 2. Data Berat Muatan Dump Truck Tipe 777D............................................8 Lampiran 3. Data Berat Muatan Dump Truck Tipe HD785.......................................20 Lampiran 4. Faktor Guna Membentuk Grafik Pengendali Variabel..........................27