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Dody Chandrahadinata
Institut Teknologi Garut
Education Industrial & Manufacturing Engineering

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Persediaan Bahan Baku Kedelai dengan Metode EOQ dan POQ di Pabrik Tahu AS Berkah Putra Dody Chandrahadinata; Ujang Cahyadi; Muhamad Risky Gahara
Jurnal Kalibrasi Vol 20 No 2 (2022): Jurnal Kalibrasi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/kalibrasi/v.20-2.1183

Abstract

Raw materials become a very important thing in production because if there is a shortage of raw materials it will result in cessation of production or excess raw materials will result in increased storage costs. The purpose of this research is to find out the total cost of raw material inventory using the EOQ (Economic Order Quantity) and POQ (Period Order Quantity) methods and to create scenarios for company inventory planning. Previously, the company placed orders for raw materials with an average of 2319 kg of orders with an order frequency of 48 times a year. The EOQ method can be used at the Berkah Putra AS Tofu factory because it gets a minimum total cost of raw material inventory, which is Rp. 114,672. The frequency of orders in one year is 5 times with a quantity of 5,460 kg of orders. This can minimize costs and control raw material supplies on a regular basis.
Analisis Kualitas Produk Karet Ribbed Smoked Sheet menggunakan SQC dan FMEA Dody Chandrahadinata; Dedi Sa’dudin Taptajani; Muhlis Sa’bani
Jurnal Kalibrasi Vol 19 No 2 (2021): Jurnal Kalibrasi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/kalibrasi/v.19-2.1067

Abstract

Produk karet Ribbed Smoked Sheet (RSS) yang dihasilkan oleh PTPN VIII Kebun Mira Mare memiliki cacat produk pada proses penyaringan busa yang berupa cacat hasil karet menggelembung. Tingkat kecacatan yang ditoleransi adalah 1% sedangkan pada prosesnya melebihi batas yang telah ditentukan sehingga perlu diperbaiki agar tingkat kecacatatannya dapat menurun. Tujuan penelitian ini adalah untuk mengetahui faktor-faktor penyebab terjadinya cacat produk sehingga dapat menurunkan tingkat kecacatan pada proses penyarinang busa dengan memberikan usulan perbaikan dengan cara mereduksikan kecacatan dari proses penyaringan busa. Adapun pada penelitian ini menggunakan Statistical Quality Control (SQC) menggunakan 6 tahap antara lain check sheet, stratifikasi, histogram, pareto, peta proses operasi. Dan fishbone. Berdasarkan hasil penelitian, terdapat beberapa faktor yang mempengaruhi tingkat kecacatan pada proses penyaringan busa yaitu: mesin, material, manusia dan metode. Fault Mode and Effect Analysis (FMEA) dilakukan untuk memberikan usulan perbaikan dan memfokuskan evaluasi dalam proses penyaringan busa di PTPN VIII kebun Mira Mare. Dangan adanya penelitian ini, diharapkan dapat menyelesaikan permasalahan tersebut serta dapat menentukan usulan perbaikan sehingga bisa membantu pihak perusahaan untuk menurunkan tingkat cacat pada saat proses penyaringan busa.
Analisa Pengukuran Produktivitas Perusahaan Menggunakan Metode Marvin E. Mundel Di CV Taruna Jaya Dody Chandrahadinata; Rika Maelani
Jurnal Kalibrasi Vol 21 No 1 (2023): Jurnal Kalibrasi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/kalibrasi/v.21-1.1096

Abstract

Penelitian di CV. Taruna Jaya bertujuan untuk mengukur produktivitas selama periode pengukuran dengan menggunakan metode Marvin E. Mundel, dengan indicator dianntaranya: Deflator, Harga Konstan, Total RIP, Agregat Output, Indeks Produktivitas Parsial dan Indeks Produktivtas Total. Jumlah permintaan selama periode yang diteliti sebanyak 434.500 lusin lilin angka dan 27.300 lusin lilin spiral. Berdasarkan jumlah biaya setiap input, nilai perolehan yang didapat dari hasil pengolahan data adalah indeks produktivitas material tertinggi dicapai pada periode ke 5 sebesar 3,25 yaitu pada bulan April 2021 dengan periode dasar pada bulan desember 2020. Nilai produktivitas tenaga kerja tertinggi sebanyak 23,41, nilai produktivitas maintenance sebanyak 2,35 dan nilai produktivitas energi tertinggi sebesar 28,9. Hasil evaluasi dan analisis menggunalan metode fishbone diagram menunjukan beberapa faktor yang menyebabkan kurangnya produktivitas di perusahaan. Penyabab masalah yang terdapat di peerusahaan antara lain: material, manusia, mesin, dan energi dan utilitas. Dengan beberapa usulan ternyata faktor manusia paling banyak poin terjadi permasalahan. Sehingga dibutuhkan upaya-upaya untuk meningkatkan produktivitas perusahaan dan melakukan terhadap keempat kriteria tersebut.
Optimasi Persediaan Perencanaan dan Pengendalian Biaya Air Minum Kemasan di CV. Dinasti 611 Dody Chandrahadinata; Ujang Cahyadi; Uji Ramdani
Jurnal Kalibrasi Vol 21 No 2 (2023): Jurnal Kalibrasi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/kalibrasi/v.21-2.1253

Abstract

CV Dynasty is a trading company engaged in the distribution of bottled drinking water. The CV Dynasty 611 company collaborates with suppliers to supply bottled drinking water. In carrying out its business processes, this company is often hampered by inventory management. This can be seen from the accumulation of goods and frequent placing of orders with suppliers, as well as problems in fulfilling products to consumers. So a method is needed to solve problems in inventory management and optimize storage and ordering costs and avoid buildup in the warehouse. So the inventory management method was chosen Economic order quantity, silver meal heuristic and Min – max method. These three methods are inventory management methods which are expected to be able to solve problems that occur at the CV Dynasty 611 company. The EOQ method produces an order frequency of 19 times, safety stock of 102 crates, ROP of 118 crates with a total inventory cost of IDR 36,925,824 and inventory cost efficiency of IDR 2,226,976 with an inventory cost efficiency percentage of 6%. Meanwhile, using the silver meal heuristic method produces an ordering frequency of 12 times a year, safety stock 156, ROP 114, total inventory costs IDR 8,881088 with inventory cost efficiency IDR 30,271,712 with a percentage of 77%. Meanwhile, using the min - max method produces an order frequency of 13 times in one year with a safety stock of 102 crates, ROP 114 crates with a total inventory cost of 34,071,456 with an inventory cost efficiency of IDR 5,081,341 with an inventory cost efficiency percentage of 13%. Therefore, it is recommended that companies use the silver meal heuristic method to optimize inventory costs.
Perancangan Strategi Pemberdayaan Masyarakat Miskin Dalam Mengoptimalkan Bantuan Pemerintah Di Kabupaten Garut Dody Chandrahadinata; Kemal Faizal Rijaldi
Jurnal Kalibrasi Vol 24 No 1 (2026): Jurnal Kalibrasi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/kalibrasi/v.24-1.1653

Abstract

This study aims to categorize communities based on their characteristics and regional potential, as well as to develop a strategic framework for optimizing empowerment aid programs tailored to those factors. The issue addressed in this research stems from the inaccurate grouping of communities solely based on either community characteristics or regional potential, resulting in ineffective aid strategies and a subsequent increase in poverty levels. According to data from the Central Statistics Agency (Badan Pusat Statistik), the poverty rate in Garut Regency has shown a rise in recent years (2023–2024). The government holds the primary responsibility in formulating strategies to address poverty. Currently, government strategies for distributing aid largely focus on economic factors alone, often resulting in cash assistance. In the long term, this approach negatively impacts the community's mentality, fostering dependency and reducing motivation for self-sufficiency. This study employs a mixed methods approach. The classification process uses the K-Means algorithm, while the decision-making process applies the Analytic Network Process (ANP) method. The objective of this research is to identify effective poverty alleviation policies in Garut Regency, West Java, by forming groups based on community characteristics and regional potential, and to produce a strategic plan for delivering aid programs tailored to these classifications.
Peningkatan Produktivitas UMKM Menggunakan Integrasi Metode OMAX dan AHP Dody Chandrahadinata; Hendriyana
Jurnal Kalibrasi Vol 24 No 1 (2026): Jurnal Kalibrasi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/kalibrasi/v.24-1.1787

Abstract

Micro, Small, and Medium Enterprises (MSMEs) play an important role in the Indonesian economy with significant contributions to employment and regional economic stability. Satria Pramuka MSME, located in Garut Regency, is one of the MSMEs that produces talikur for scout equipment. Despite its great potential, this MSME faces challenges in achieving consistent monthly production levels, which affects its ability to meet consumer demand and compete in the market. This study applies the Objective Matrix (OMAX) and Analytical Hierarchy Process (AHP) methods. The OMAX method is used to measure productivity based on various relevant criteria, such as production efficiency and effectiveness. The results show that the integration of these two methods is effective in identifying productivity gaps and setting priorities for improvement actions from OMAX and FTA, which are then used in the AHP model to set priorities for improvement actions. The integration of the OMAX and AHP methods provides a comprehensive framework for planning productivity improvements at Satria Pramuka SME. The implementation of this plan is expected to improve production consistency and the competitiveness of MSMEs with a structured data-based productivity improvement plan at Satria Pramuka MSMEs so as to achieve more consistent production targets, meet consumer demand, and compete more effectively in the market.
Peningkatan Produktivitas Produksi Dodol Menggunakan OMAX dan FTA Pada Industri Makanan Tradisional Intan Nuraeni; Dody Chandrahadinata
Jurnal Kalibrasi Vol 24 No 1 (2026): Jurnal Kalibrasi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/kalibrasi/v.24-1.2515

Abstract

This study analyzes the productivity level of the dodol production division in the traditional food industry, which experienced a production target discrepancy between September 2024 and January 2025. This study aims to measure productivity, identify the main contributing factors, and formulate a comprehensive improvement plan. The methods used include the Objective Matrix (OMAX) for productivity measurement with Analytical Hierarchy Process (AHP) weighting, Traffic Light System (TLS) visualization, and root cause identification through Fault Tree Analysis (FTA). The analysis results show an average productivity index of 502, with labor identified as the dominant factor causing low productivity. Further FTA analysis revealed a lack of work supervision as the main root cause with a probability of 0.27, followed by unproductive working hours and procedural errors. Based on these findings, it is proposed to plan productivity improvements based on the 5W+1H framework, which focuses on increasing direct supervision by those responsible through the development and implementation of Standard Operating Procedures (SOPs). This is expected to ensure compliance with standards, minimize errors, and improve product efficiency and quality on an ongoing basis.
Peningkatan Perbaikan Kualitas Produk Duplex Paper Coated Menggunakan Metode Six Sigma: (Studi Kasus :PT. Papyrus Sakti Paper Mill) Dody Chandrahadinata; Putri Laya
Jurnal Kalibrasi Vol 24 No 1 (2026): Jurnal Kalibrasi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/kalibrasi/v.24-1.2546

Abstract

Competition in the paper industry requires companies to continuously improve product quality. This study aims to identify the main causes of defects in Duplex Paper Coated (DPC) products at PT. Papyrus Sakti Paper Mill and to develop measurable improvement measures to achieve a sigma level greater than or equal to 4. Based on production data from January to July 2024, the average DPC defect rate was 7.8%, exceeding the company's tolerance of 6%. The Six Sigma approach with DMAIC (Define, Measure, Analyze, Improve, Control) stages was applied, supplemented with FMEA and 5W+1H analysis, to identify the root causes of dominant defects and formulate improvement solutions. The analysis results showed that uneven formation defects were the most dominant type, with the method factor (lack of SOP implementation in the forming process) as the main root cause. An improvement plan was developed using the 5W+1H method and implemented through the creation of new SOPs, operator training, machine recalibration, and process variable monitoring. After the improvements, the process sigma value increased from 4.19 to 4.48, accompanied by a significant reduction in defect rates, thereby achieving the quality target (sigma greater than or equal to 4). This improvement proves that the application of Six Sigma is effective in continuously controlling the quality of DPC products.
Pendekatan Statistical Quality Control untuk Peningkatan Kualitas Produk Spare part Mobil Dody Chandrahadinata; Encep Jianul Hayat; Savina Tika Sari
Jurnal Kalibrasi Vol 24 No 1 (2026): Jurnal Kalibrasi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/kalibrasi/v.24-1.2619

Abstract

This study was conducted at PT. XYZ, an automotive spare parts manufacturing company, which experienced a product defect rate of 5.4%, exceeding the company's tolerance limit of 3%. The types of defects found included dimension (non-standard size), scratch, burry (stuck cutting residue), and rusty (rust). The objectives of this study were to analyze quality control, identify the main causes of defects, and formulate improvement proposals using the Statistical Quality Control (SQC) method. Defect data from January to June 2024 were analyzed using check sheets, Pareto charts, and fishbone diagrams. The Pareto analysis results showed that burrs had the highest percentage, accounting for 28% of total defects. The FMEA analysis identified machine factors as the dominant cause, with the highest RPN value of 288 in cases of imprecise dies. Improvement recommendations focused on implementing a continuous maintenance schedule, replacing worn components, and readjusting dies, which are expected to reduce the defect rate to below 3% and improve production process stability. This research contributes to improving the quality and efficiency of automobile spare part production at PT. XYZ.
Pengendalian Kualitas Pada Produk Spons EPA Dengan Menggunakan Metode Statistical Process Control (SPC) : Studi kasus: CV. Mandala Logam Utama Dody Chandrahadinata; Ani Ramadhani
Jurnal Kalibrasi Vol 24 No 1 (2026): Jurnal Kalibrasi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/kalibrasi/v.24-1.2621

Abstract

CV. Mandala Logam Utama is a manufacturing company that produces EPA sponges made from synthetic rubber. During the production process, a high defect rate was found, averaging 12% per month, exceeding the company's tolerance limit of 10%, with the dominant type of defect being undeveloped sponges. This study aims to identify the types of defects and factors causing defects in EPA sponge products and to design quality improvement recommendations to minimize the defect rate in the EPA sponge manufacturing process. The analysis results show that the main causes originate from machine factors, particularly unstable hotpress temperatures and damage to the sil, with the highest RPN value of 694. Improvement recommendations include routine machine maintenance, temperature calibration, installation of electrical stabilizers, and the preparation of SOPs for machine operation and maintenance. After the improvements were implemented, a 7-day simulation was conducted, which showed a significant decrease in the defect rate to an average of 2.35%. This study proves that a structured quality control approach can improve the stability of the production process and the quality of EPA sponge products.
Co-Authors Ani Ramadhani Anton Sugiarto Clearen Amal Widya Gemilang Dedi Sa'dudin Taptajani Dudi Kusuma Encep Jianul Hayat Fajar Timur Hendriyana Intan Nuraeni Kemal Faizal Rijaldi Magvira Apriliani Syadiah Mela Elyana Muhamad Risky Gahara Muhamad Sidqi Musabik Ramdani Muhammad Sya'ban Muhlis Sa’bani Putri Laya Rian Wibawa Rika Maelani Savina Tika Sari Ujang Cahyadi Uji Ramdani Wakim Nurdiana Yusuf Mauluddin