Dewangga, Leon Omar Sakha (2026) Peningkatan Kapabilitas Proses Produksi Multi Quality Characteristics Menggunakan Sigma Level dengan Pendekatan DMAIC pada Proses Produksi Tableware. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kualitas produk keramik tableware ditentukan oleh beberapa karakteristik mutu secara simultan, sehingga pendekatan Single Quality Characteristic pada Six Sigma konvensional kurang memadai. Penelitian ini bertujuan meningkatkan kapabilitas proses produksi keramik tableware melalui kerangka DMAIC pada proses Dust Press untuk produk Flat Plate. Tahap Define mengidentifikasi lima Critical Quality Characteristics (CQC) yaitu diameter, tinggi, berat, kekuatan fisik, dan kualitas permukaan. Tahap Measure atas 4.520 unit produksi dengan 110 unit loss menghasilkan DPMO 4.867, Sigma Level 4,09σ, dan Yield 97,57%, dengan Cp 1,36 dan Cpk 0,86 yang diderivasi dari Sigma Level. Pembobotan Pairwise Comparison (Consistency Ratio 0,076) menetapkan Diameter dan Tinggi sebagai prioritas utama, dengan 68,63% bobot kumulatif. Pada tahap Analyze, uji proporsi satu sampel membuktikan Defect Rate aktual (2,43%) berbeda signifikan dari ambang kinerja internal 2,0% (p = 0,043), sedangkan uji Chi-Square menunjukkan status Defect tidak berasosiasi signifikan dengan Operator (p = 0,936) maupun Shift (p = 1,000). Triangulasi bukti statistik dan mekanistik mengidentifikasi kondisi aus cetakan sebagai kandidat faktor dominan bagi Diameter, dan kesalahan kalibrasi jarak tekan mekanis bagi Tinggi. Tahap Improve merumuskan dua belas alternatif perbaikan yang dikonsolidasikan menjadi empat kelompok rekomendasi, sedangkan tahap Control menghasilkan rancangan Control Plan konseptual bagi kelima CQC. Penelitian ini berkontribusi melalui integrasi evaluasi Multi Quality Characteristics, Pairwise Comparison, dan identifikasi faktor dominan X dalam satu kerangka DMAIC pada industri keramik tableware.
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Ceramic tableware quality is determined by several characteristics simultaneously, so the conventional Single Quality Characteristic approach in Six Sigma is insufficient. This study aims to improve the production capability of ceramic tableware through the DMAIC framework, focusing on the Dust Press process for Flat Plate products. The Define stage identified five Critical Quality Characteristics (CQC): Diameter, Height, Weight, Physical Strength, and Surface Quality. The Measure stage, based on 4,520 units produced with 110 units lost, Yielded a DPMO of 4,867, a Sigma Level of 4.09σ, and a Yield of 97.57%, with Cp of 1.36 and Cpk of 0.86 derived from the Sigma Level. Pairwise Comparison weighting (Consistency Ratio 0.076) established Diameter and Height as the top priorities, accounting for 68.63% of the cumulative weight. In the Analyze stage, a One-Sample Proportion Test showed the actual Defect Rate (2.43%) differed significantly from the internal threshold of 2.0% (p = 0.043), while Chi-Square tests showed no significant association between Defect status and Operator (p = 0.936) or Shift (p = 1.000). Triangulation of statistical and mechanistic evidence identified die wear as the most plausible dominant factor for Diameter, and mechanical stroke calibration error for Height. The Improve stage formulated twelve improvement alternatives consolidated into four recommendation groups, while the Control stage produced a conceptual Control Plan for all five CQC. This research contributes by integrating Multi Quality Characteristics evaluation, Pairwise Comparison, and dominant factor identification within a single DMAIC framework for the ceramic tableware industry.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Multi Quality Characteristics, DMAIC, Sigma Level, DPMO, Pairwise Comparison, tableware, Six Sigma |
| Subjects: | T Technology > TS Manufactures > TS156 Quality Control. QFD. Taguchi methods (Quality control) T Technology > TS Manufactures > TS176 Manufacturing engineering. Process engineering (Including manufacturing planning, production planning) |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Industrial Engineering > 26201-(S1) Undergraduate Thesis |
| Depositing User: | Leon Omar Sakha Dewangga |
| Date Deposited: | 31 Jul 2026 06:52 |
| Last Modified: | 31 Jul 2026 06:52 |
| URI: | http://repository.its.ac.id/id/eprint/140811 |
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