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All Journal INAQUE: Journal of Industrial & Quality Engineering Jurnal Sains dan Teknologi Golden Ratio of Data in Summary Jurnal Pengabdian West Science Jurnal Polimesin
Purwanto, Cipto
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Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences

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Quality improvement using lean six sigma in air conditioning products Purwanto, Cipto; Jayanti, Brian Sila; Bernard, Fransiska Sekarlati; Ekawati, Ardhianiswari Diah
Jurnal Polimesin Vol 22, No 5 (2024): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i5.5408

Abstract

Air Conditioners (AC) are essential electronic products for residential and industrial buildings in tropical countries or during warm weather in general. The penetration ratio of electronic Air Conditioners (AC) has been increasing every year. Data collection and processing were conducted directly by the author through observation, measurement, and calculation on the heat exchanger production of Air Conditioners (AC). In the production cost of Air Conditioners (AC), the heat exchanger accounts for the second highest cost after the compressor making up 19% of the total cost. The high cost is caused by pipe leaks, with a percentage of 73.7%. This research aims to analyze the improvement of Air Conditioner (AC) production quality using the Six Sigma method. The defect rate in the heat exchanger, evaluated through the Define, Measure, Analyze, Improve, Control (DMAIC) method originating from Six Sigma, was found to be 1,144.8 defects per million opportunities. Further analysis was conducted with the Failure Tree Analysis (FTA) and Failure Mode and Effect Analysis (FMEA) methods. This research was conducted at XYZ company by conducting interviews and observations for 3 months. FMEA and FTA analysis resulted in the top two failure risks based on the Risk Priority Number (RPN): flaring diameter too big and unstable brazing skill. In the manual brazing process, it was found that work by operators with level A certification produced 9% below standard outcomes. An improvement was obtained by changing the punch flaring size to 8.5mm and conducting skill certification and training for brazing operators. The results of the proposed improvement implementation led to a reduction in the DPMO value to 403.35, equivalent to a decrease of 64.7%. The defect ratio in production decreased by 38.1%, exceeding the previous target of 26.2%, equivalent to $31.96/month/unit. The results of this study are horizontal, allowing the implementation of improvements made in the heat exchanger production process to be expanded to other cooling electronic production processes.
Pemberdayaan Sumber Daya Manusia melalui Pelatihan Manajemen Kinerja untuk Meningkatkan Produktivitas UMKM di Desa Bojongsari Heriyanti, Sinta Sundari; Baldah, Nasrun; Suhendra, Suhendra; Purwanto, Cipto; Kartini, Tri Mulyani
Jurnal Pengabdian West Science Vol 4 No 12 (2025): Jurnal Pengabdian West Science
Publisher : Westscience Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58812/jpws.v4i12.3004

Abstract

Pengabdian masyarakat ini bertujuan untuk meningkatkan kapasitas pelaku UMKM di Desa Bojongsari, Kabupaten Bekasi, melalui pelatihan manajemen kinerja. Latar belakang kegiatan ini adalah masih rendahnya pemahaman pelaku usaha terkait perencanaan, pelaksanaan, monitoring, dan evaluasi usaha yang berdampak pada keterbatasan daya saing di tengah persaingan bisnis yang semakin ketat. Metode kegiatan dilakukan melalui pre-test, pemberian materi, praktik langsung, diskusi interaktif, serta post-test untuk mengukur peningkatan kompetensi peserta. Hasil kegiatan menunjukkan adanya peningkatan signifikan pada seluruh aspek manajemen kinerja; peserta yang sebelumnya kurang memahami konsep dasar manajemen usaha, setelah pelatihan mampu menyusun rencana kerja, mengatur proses produksi, melakukan evaluasi kinerja, dan memanfaatkan teknologi digital sederhana untuk menunjang operasional. Kesimpulannya, pelatihan ini tidak hanya memberikan pemahaman teoritis, tetapi juga mendorong perubahan perilaku manajerial yang aplikatif pada UMKM. Rekomendasi utama adalah perlunya pendampingan berkelanjutan dan kolaborasi lintas sektor agar transformasi ini dapat berkontribusi nyata terhadap keberlanjutan dan daya saing UMKM di daerah tersebut.
Penerapan Quality Control Circle (QCC) dengan Siklus PDCA 8 Langkah untuk Perbaikan Proses Perakitan pada Produksi Drape Septiana, Muhamad Fikri; ., Setiawan; Purwanto, Cipto
Jurnal Sains dan Teknologi (JSIT) Vol. 6 No. 1 (2026): Januari - April
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v6i1.4264

Abstract

The quality standards in the assembly process of hoses and connectors for drape products at PT XYZ still face issues related to the high number of non-conforming products (NG), caused by difficulties in assembling the hose to the connector due to uneven and imprecise hose cutting results. This condition leads to increased customer complaints due to installation difficulties on the user's side. Additionally, the variation in hose cutting results causes inconsistencies in product quality, increasing the risk of production cost wastage. This study aims to identify the main causes of defects in the hose and connector assembly process and formulate a systematic improvement proposal to reduce NG levels and enhance the production process quality. The method used is Quality Control Circle (QCC) with an eight-step PDCA approach. Data collection techniques include direct observation in the production area, interviews with operators and related teams, and analysis of historical NG product documentation. Root cause analysis is carried out using the Seven Tools of Quality, particularly the Pareto chart and fishbone diagram, to determine the dominant factors causing the issue. The results show that the main cause of defects comes from the manual and imprecise hose cutting method, which complicates the connector assembly process. The proposed improvements, including the design and implementation of a hose cutting machine, the use of cutting jigs, and operator training, have proven effective in reducing NG levels and improving the consistency of the hose and connector assembly process quality.
A Multi-Criteria Decision Making for Automated Storage System Selection in the Warehousing Industry Using AHP-TOPSIS Purwanto, Cipto; Ats-Tsauri, M. Ibrahim; Syahliantina, Annisa; Azizah, Ghina Farhah; Pratiwi, Christa Dian
Golden Ratio of Data in Summary Vol. 6 No. 1 (2026): November - January
Publisher : Manunggal Halim Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52970/grdis.v6i1.1929

Abstract

The growing demand for customized products and shorter delivery times has intensified the pressure on logistics and warehouse operations to become more efficient, flexible, and responsive. In this context, selecting an appropriate automated storage and retrieval system (AS/RS) is a complex multi-criteria decision-making (MCDM) problem that requires a systematic, quantitative evaluation approach. This study proposes an integrated decision-making framework that combines the Analytic Hierarchy Process (AHP) and the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) to determine the most suitable automated storage technology for warehousing operations. Four key criteria were identified—Throughput, Accuracy, Ergonomics, and Space Utilization—and three alternatives were evaluated: Miniload, Vertical Carousel, and Vertical Lift. The AHP method was used to derive the relative importance of the criteria, producing consistent weights with a CR value of 8.28%. These weights were subsequently applied in the TOPSIS analysis to rank the alternatives based on their closeness to the ideal solution. The results indicate that Vertical Lift emerged as the optimal choice (CC = 0.6657), followed by Vertical Carousel (CC = 0.4657) and Miniload (CC = 0.3688). Sensitivity analysis, conducted through both One-at-a-Time (OAT) and scenario-based approaches, confirmed the robustness of the decision model under varying preference scenarios. This research contributes to the body of knowledge on warehouse automation decision-making by providing a transparent, quantitative, and adaptable framework that supports managers in enhancing operational performance and optimizing resource utilization.
ANALISIS POSTUR KERJA OPERATOR PADA AKTIVITAS PENGAMBILAN FRONT WHEEL DI ASSEMBLING UNIT 2A PT XYZ MENGGUNAKAN METODE REBA Wijaya, Indra; Setiawan, Setiawan; Purwanto, Cipto
Inaque : Journal of Industrial and Quality Engineering Vol 14 No 1 (2026): Inaque April 2026
Publisher : Teknik Industri Unikom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34010/iqe.v14i1.19485

Abstract

The purpose of this study is to evaluate the level of ergonomic risk in the front wheel retrieval activity performed by operators in the assembling unit 2A area of the automotive industry and to propose solutions to reduce the potential occurrence of Musculoskeletal Disorders (MSDs). In this study, the Rapid Entire Body Assessment (REBA) method was used, supported by direct observation, documentation of operator working postures, and interviews. The initial analysis results showed that the activity had a REBA score of 10, which falls into the high-risk category and requires immediate corrective action. The results indicate that the front wheel retrieval process can be assisted by using a hook suspended from an Endo (spring balancer) and moving along a Henderson rail. After implementing the proposed improvement, the REBA score decreased to 3, indicating a low-risk level. These results demonstrate that the use of assistive tools can improve the operator’s working posture, reduce physical workload, and minimize the risk of MSDs. This study contributes to improving work comfort, operator safety, and productivity in the assembling unit production line.
Co-Authors Ardhianiswari Diah Ekawati, Ardhianiswari Diah Ats-Tsauri, M. Ibrahim Azizah, Ghina Farhah Baldah, Nasrun Bernard, Fransiska Sekarlati Christa Dian Pratiwi Heriyanti, Sinta Sundari Jayanti, Brian Sila Kartini, Tri Mulyani Septiana, Muhamad Fikri Setiawan . Setiawan Setiawan Suhendra Suhendra Syahliantina, Annisa Wijaya, Indra