Usulan Perbaikan Sistem Perawatan Mesin dengan Pendekatan Computerized Maintenance Management System (CMMS) di PT. NTP

PT. NTP adalah perusahaan yang bergerak dalam bidang industri turbin, sistem propulsi dirgantara, pembuatan rotating equipment di Indonesia, dan juga merupakan perusahaan pertama sebagai pusat perawatan dan perbaikan gas turbin di Indonesia. Jam penggunaan mesin yang lama yang dipengaruhi oleh meningkatnya jumlah permintaan dari konsumen akan berdampak pada performa/kondisi mesin yang akan semakin menurun bila tidak dilakukan perawatan secara berkala baik secara preventive maupun corrective. Penelitian dilakukan pada divisi Machining Shop yang beroperasi selama 8,5 jam untuk hari kerja Senin-Kamis dan 7,5 jam untuk hari kerja Jumat. Dihasilkan perhitungan Overall Equipment Effectiveness (OEE) dan mesin kritis untuk mengidentifikasi nilai efektivitas mesin dan mengetahui tingkat keandalan (reliability) suatu mesin. Yang termasuk kedalam mesin kritis dalam penelitian ini adalah mesin MS-019 CNC Lathe, MS-011A Universal Milling, MS-010B Surface Grinding, MS-008 Cylindrical Grinding, dan MS-009 Cylindrical Grinding. Dalam penelitian ini dibangun sebuah bangunan sistem perawatan terintegrasi dalam pendekatan konsep Computerized Maintenance Management System (CMMS)

The Proposed Warehouse Improvement Using Lean Approach to Eliminate Waste at the Main Warehouse of PT. XYZ

One of the grocery companies in Indonesia provides a multi-channel e-groceries digital platform for online daily shopping activities. One of the important elements that support the operational activities of an e-commerce service industry is the warehouse, which serves as a storage place for goods sold and plays a role in maintaining the quality of products before being sent to consumers. Based on observations and interviews directly with employees at the Main Warehouse, one of the causes of waste in its operational activities is the lack of optimal warehousing activities. This research aims to find out and identify waste in the Main Warehouse’s warehousing activities so that the waste that occurs can be investigated, the implementation of the Lean Warehouse approach is needed in its warehousing activities. The research began with Current State VSM with a PCE value of 47.94%, followed by Process Activity Mapping (PAM) and TIM U WOOD Assessment Questionnaire. The results of this study were obtained based on predictions after the proposed improvements were implemented, there was a reduction in processing time and the amount of waste that occurred in several operational activities at the Main Warehouse. The PCE value increased as 5.22% to 53.16% in the Future State VSM

Production Process Improvement Design to Eliminate Waste in 428H Chain Products Using Lean Manufacturing at PT ABC

PT ABC is a manufacturing company that produces several types of chains in large quantities, and one type of chain that is the main focus of this research is the 428H chain. The obstacle faced in producing the 428H Chain is not achieving the production target from June to July, and September to November 2021. The research focuses on minimizing manufacturing lead time using lean manufacturing by eliminating waste in the 428H Chain production process. Waste elimination is done by providing suggestions for improvements based on the identified waste types. The study begins with the calculation of the time sample, then MLT, PCE, the use of the Waste Assessment Model, and mapping current value stream mapping. The initial MLT was 832.95 minutes and PCE was 63.37%. WAM produces the highest percentage of waste in the type of defect, then motion, inventory, waiting, overproduction, motion, and process. The proposed improvements are in the form of designing SOP Operators on Pressing machines, adding Small Incline Belt Conveyor tools, designing SOPs for Activities in the WIP Area, and adding Manual Hand Stacker tools. The provision of improvement proposals resulted in MLT decreasing 12% to 733.2174 minutes and PCE increasing 8.6% to 71.98%, and the production target was achieved with total production per month increasing by 12%, from 21,783 to 24,746 units per month

Production Process Improvement Design to Eliminate Waste in 428H Chain Products Using Lean Manufacturing at PT ABC

PT ABC is a manufacturing company that produces several types of chains in large quantities, and one type of chain that is the main focus of this research is the 428H chain. The obstacle faced in producing the 428H Chain is not achieving the production target from June to July, and September to November 2021. The research focuses on minimizing manufacturing lead time using lean manufacturing by eliminating waste in the 428H Chain production process. Waste elimination is done by providing suggestions for improvements based on the identified waste types. The study begins with the calculation of the time sample, then MLT, PCE, the use of the Waste Assessment Model, and mapping current value stream mapping. The initial MLT was 832.95 minutes and PCE was 63.37%. WAM produces the highest percentage of waste in the type of defect, then motion, inventory, waiting, overproduction, motion, and process. The proposed improvements are in the form of designing SOP Operators on Pressing machines, adding Small Incline Belt Conveyor tools, designing SOPs for Activities in the WIP Area, and adding Manual Hand Stacker tools. The provision of improvement proposals resulted in MLT decreasing 12% to 733.2174 minutes and PCE increasing 8.6% to 71.98%, and the production target was achieved with total production per month increasing by 12%, from 21,783 to 24,746 units per month

The effects of I-Beam thickness to microstructure and compression load of thin wall ductile iron connecting rod

Lighter automotive components are needed to reduce energy consumption. The manufacturing processes of the components should also consume less energy and be environmentally friendly. Aluminum is a lightweight material, but the manufacturing processes consume a lot of energy. Ductile iron has outstanding design flexibility and applying a thin wall casting technique to the ductile iron components will reduce the weight and make it possible for ductile iron to compete with lightweight materials. The achievement of making a 3 mm I-beam thickness connecting rod which fulfills the design requirement in previous research has encouraged a further reduction in the I-beam thickness. This action is taken to enhance the weight reduction gained from the connecting rod. The aims of this work are to ensure the repeatability resulting from the design of 3 mm I-beam thickness and the ability of the casting design to produce the 2 mm I-beam thickness. Solidification rates in thin wall casting are critical due to the differences in thicknesses in the product. It is also to analyze the effect of I-beam thickness on the compression load. Two types of I-beams, which differ in their thickness, 3 mm and 2 mm, were produced in the foundry scale. All the I-beams were characterized by their microstructure and compression load. The compression load was measured using the tensile method. The results of microstructure observations revealed that the microstructure in I-beam is different from the one in the end rod except for one casting position, while the result of compression load shows a similar value for average compression load between the 3 mm and 2 mm which fulfill the compression load requirement of connecting rod. The casting designs built in this research can produce thin wall ductile iron (TWDI) connecting rods that could stand similar load with the original one