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Dody Chandrahadinata
Sekolah Tinggi Teknologi Garut
Education Industrial & Manufacturing Engineering

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Optimasi Persediaan Perencanaan dan Pengendalian Biaya Air Minum Kemasan di CV. Dinasti 611 Chandrahadinata, Dody; Cahyadi, Ujang; Ramdani, Uji
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.
Perencanaan Peningkatan Kualitas Produk Kasur Karpet dengan Metode Kano dan House of Quality Taptajani, Dedi Sa’dudin; Chandrahadinata, Dody; Irsyadilhaq, Imam Nursalam
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.21-2.1500

Abstract

Ikmal Surpet is a company that produces Carpet Mattresses. The vision of the company is to make a company in the field of superior and quality mattresses while its mission itself is to maintain and improve the quality of superior local products. In line with the Company's Vision and Mission, the aim of this research is to find out what attributes need to be considered, maintained and improved regarding the level of satisfaction and quality of surpet products (carpet mattresses). Planning to improve the quality of surpet products (carpet mattresses). The Kano method is used to find out what attributes need to be paid attention to, maintained and improved. The House of Quality method is used to make improvement proposals. The research results show that there are two attributes that need to be considered, namely: the product has neat stitching and the product design has its own characteristics, there are five attributes that need to be maintained, namely: the product uses quality raw materials, the upholstery feels soft & soft, the product can long lasting, varied product designs, and attractive product designs., and what attributes need to be improved, there are two attributes, namely: flexible surpet products, and having sizes according to needs. To plan to improve the quality of carpet mattress products, nine attributes were obtained which would become priority improvements with their respective technical responses.
Perbaikan Kualitas Untuk Menurunkan Tingkat Cacat Produk Di Konveksi Rajut Garut Maulana, Irsan; Chandrahadinata, Dody
Jurnal Kalibrasi Vol 22 No 1 (2024): Jurnal Kalibrasi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/kalibrasi/v.22-1.1541

Abstract

Quality is a consumer's perspective on a product regarding all aspects that consumers need, one of which is freedom from product defects. The level of defective sweater products at the Garut Knitting Convection still exceeds the specified limits, so it is necessary to conduct a study regarding quality control. The aim of this research is to determine the types of defects and factors that cause defects in sweater products, and to design improvements so that they can minimize the level of defects. The approach used utilizes the defining, measuring, analyzing, improving and controlling (DMAIC) stages of the Six Sigma method, and is elaborated with quality control tools. The research results show the measurement results of the type of sweater defects that are often found, namely the type of stain defect. Next, an analysis was carried out using a cause and effect diagram on the type of stain defects so that several factors were obtained, and the risk of failure for each identified factor was measured and produced material factors with the potential for dirty raw materials with the largest risk priority number (RPN). Meanwhile, further analysis was carried out on the greatest potential risk of failure so that an improvement plan could be obtained to reduce the level of defects in sweater products by adding yarn cleaning tools to be processed, as well as preparing SOP’s for using yarn cleaning tools on knitting machines. The results of implementing improvements that have been carried out have proven to be able to reduce the level of loss in sweater products by 4.37%.
Perbaikan Kualitas Untuk Menurunkan Tingkat Cacat Produk Di Konveksi Rajut Garut Maulana, Irsan; Chandrahadinata, Dody
Jurnal Kalibrasi Vol 22 No 1 (2024): Jurnal Kalibrasi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/kalibrasi/v.22-1.1541

Abstract

Quality is a consumer's perspective on a product regarding all aspects that consumers need, one of which is freedom from product defects. The level of defective sweater products at the Garut Knitting Convection still exceeds the specified limits, so it is necessary to conduct a study regarding quality control. The aim of this research is to determine the types of defects and factors that cause defects in sweater products, and to design improvements so that they can minimize the level of defects. The approach used utilizes the defining, measuring, analyzing, improving and controlling (DMAIC) stages of the Six Sigma method, and is elaborated with quality control tools. The research results show the measurement results of the type of sweater defects that are often found, namely the type of stain defect. Next, an analysis was carried out using a cause and effect diagram on the type of stain defects so that several factors were obtained, and the risk of failure for each identified factor was measured and produced material factors with the potential for dirty raw materials with the largest risk priority number (RPN). Meanwhile, further analysis was carried out on the greatest potential risk of failure so that an improvement plan could be obtained to reduce the level of defects in sweater products by adding yarn cleaning tools to be processed, as well as preparing SOP’s for using yarn cleaning tools on knitting machines. The results of implementing improvements that have been carried out have proven to be able to reduce the level of loss in sweater products by 4.37%.
Perancangan Peningkatan Kinerja Green Supply Chain Management Rahman Ramadhan, Diva; Cahyadi, Ujang; Chandrahadinata, Dody
Jurnal Kalibrasi Vol 23 No 1 (2025): Jurnal Kalibrasi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/kalibrasi/v.23-1.1553

Abstract

This research aims to determine the performance measurement of Green Supply Chain Management at PD SP Leather and to make improvements to the underperforming aspects. The stages of this research consist of two phases: measurement and improvement recommendations. The measurement is conducted using the Green Supply Chain Operations Reference (SCOR) method, assessing 6 business processes, namely Plan, Source, Make, Deliver, Return, and Enable. The improvement recommendations are made using the Analytical Hierarchy Process (AHP) method. The Green SCOR measurement results indicate that out of a total of 17 designed performance indicators, 6 of them are considered subpar. The prioritization of improvement is determined using the AHP method, resulting in 6 alternative improvement options. Subsequently, the impact of these alternatives on the other 11 indicators is assessed using the House Of Quality (HOQ).
Perancangan Mesin Pemipil Jagung Ekonomis, Aman dan Efisien Menggunakan Metode Vdi 2221 (Verein Deutscher Ingenieure) Chandrahadinata, Dody; Taptajani, Dedi Sa'dudin; Suherman, Toni Hari
Jurnal Kalibrasi Vol 23 No 1 (2025): Jurnal Kalibrasi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/kalibrasi/v.23-1.1567

Abstract

This corn sheller machine will be discussed as an effective and safe tool to perform the task of shelling corn at a low production cost, safely, and economically affordable. This machine can help farmers shell maize with cheap or unused materials, reduce time and effort, and optimize the use of resources, resulting in better economic returns. Not much research has been done in Indonesia that looks at how to make an efficient, cost-effective, and safe maize sheller machine. To make an efficient, cost-effective, and safe corn sheller machine, this research uses the VDI 2221 method. The focus of her research was smallholder farmers who face geographical challenges and limited resources. The machine was made using inexpensive items such as wood, V-belt, 125 Watt Shimizu PS 128 BIT electric motor, and 2-inch pipe. Economic, safety, and efficiency analysis were conducted for the validation of the machine.Anthropometry is a tool to measure body size.
Minimalisasi pemborosan menggunakan metode lean manufacturing dan green manufacturing di UKM. Asela Chandrahadinata, Dody; Nur Fadilah, Rida
Jurnal Kalibrasi Vol 23 No 1 (2025): Jurnal Kalibrasi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/kalibrasi/v.23-1.1600

Abstract

This research aims to increase productivity by reducing waste through Lean Manufacturing and increasing profits through the utilization of raw materials in order to achieve a green manufacturing-based company. The calculation results of VALSAT Tools get a VA value of 65%, NVA 28% and NNVA of 6%. Based on the results of the weight of the 7 Waste questionnaire and 7 Waste Environmental, the biggest waste occurs in the waste of waiting by 42%, waste of transportation, inventory, and unnecessary motion by 17%. This research resulted in the design of Future Environmental Stream Mapping Design with a target cycle time of 5.94 hours from the initial time of 7.74 hours which increased productivity by 23%. And reducing solid waste from cutting fabric to make shoes resulted in a profit of Rp. 374,520. Improvement recommendations are given using the kaizen concept to reduce waiting time by reducing NVA and NNVA activity time so that it affects the production cycle time to be faster. 6R improvement recommendations are Reduce, Reuse, and Recycle to manage the waste generated.
Perancangan Rute Pengangkutan Sampah di Garut Dengan Model Penyelesaian Capacitated Vehicle Routing Problem (CVRP) Chandrahadinata, Dody; Taptajani, Dedi Sa'dudin; Fathori, Moch Zain
Jurnal Kalibrasi Vol 23 No 1 (2025): Jurnal Kalibrasi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/kalibrasi/v.23-1.1897

Abstract

The problem of urban waste management is a big challenge in Garut Regency. This research designs waste transportation routes using the Capacitated Vehicle Routing Problem (CVRP) method with a combination of Saving Matrix and Nearest Neighbor algorithms. This method is more efficient than other algorithms such as genetics, with a simple application that is relevant for urban areas. The results show that the number of routes can be reduced from 12 to 9 (25%), the travel distance reduced from 518.18 km to 312.69 km (a saving of 205.49 km), and the operational cost dropped from Rp 17,618,120 to Rp 10,631,460 (a saving of Rp 6,986,660 or 39.65%). In addition to supporting cost and time efficiency, this method reduces vehicle emissions and environmental impacts. This study provides a practical solution for the Environmental Agency (DLH) and opens up opportunities for IoT technology integration in the future.
Co-Authors Cahyadi, Ujang Fathori, Moch Zain Irsyadilhaq, Imam Nursalam maulana, irsan Nur Fadilah, Rida Rahman Ramadhan, Diva Ramdani, Uji Suherman, Toni Hari Taptajani, Dedi Sa'dudin Taptajani, Dedi Sa’dudin