SPECTA Journal of Technology

Rancang Bangun Sistem Pengendalian Kualitas Pada UMKM X Balikpapan

Rizky Pratama, Muqimuddin, Arini Anestesia Purba, Rulliannor Syah Putra — Sun, 30 Jun 2024 00:00:00 +0800

X Balikpapan is a business engaged in furniture production. Based on product defect data in 2022. It is known that there is an average gap between the percentage of the number of product defects which is 13.8% and the product defect standard that has been set on the sofa at 10%. The purpose of this study is to determine the causes of failure that must be handled and proposed countermeasures based on the expert system-based FMEA method. The methods used are FMEA and Expert System that connected to Artificial Intellegence Program. The FMEA method is a database in identifying and analyzing failures that produce a Risk Priority Number (RPN) value. The expert system method as a computer system algorithm to imitate the capabilities transferred from an expert expert to a computer to be stored in memory so that it can consult with the computer. The results of this study are in the form of an expert system website design based on the FMEA method with a percentage of data accuracy of 86.66% from 30 system testing data based on environmental conditions on the type of process failure that has occurred in sofa production which results in the type of failure that must be handled, namely in the assembly production process and the type of process failure, namely plywood or broken wood with the highest RPN value of 216 along with recommendations for efforts The countermeasures, is that before the sofa product is sent to the customer, do a final inspection of the plywood and wood used by means of a sofa durability test with a predetermined maximum load. Make sure there are no weaknesses or damage that can cause rupture of plywood and wood.

Analysis of Artificial Aging Temperature Variations on Microstructure and Mechanical Properties of Aluminum 6061 T6

Fauzi Widyawati, Muhammad Miftah Solahudin, Syamsul Hidayat — Sun, 30 Jun 2024 00:00:00 +0800

Aluminum alloy 6061 series has been used extensively in the manufacturing industry. This aluminum material was chosen because it has many advantages. The level of superiority of aluminum can be seen in terms of good machining ability, perfect surface finish, good level of corrosion resistance, and high strength. In this research, the samples used 6061 series aluminum alloy, and an artificial aging process was carried out with temperature variations of 150ᴼC, 175ᴼC, 200ᴼC, and a holding time of 8 hours. Following this, measurements were performed for hardness, impact, and microstructural observations. The research shows that the mechanical properties of the alloy after the artificial aging process tend to decrease as temperature variations increase, for the hardness value obtained at 150ᴼC is 57.34 HRB, 175ᴼC is 55.42 HRB, 200ᴼC is 46.12 HRB. For the impact value, the optimal value was obtained at a temperature of 150ᴼC with a value of 41.4 J/mm². When the microstructure was examined, it was discovered that each specimen's AlMg₂Si compound was the consequence of the artificial aging process.

Prototype Game Education Number Box Toys sebagai Upaya Mengembangkan Keterampilan Kognitif dan Motorik Anak

Indro Prakoso, Ayu Anggraeni Sibarani, Sarah Nurmalawati, Valent Okky Nurcahya — Sun, 30 Jun 2024 00:00:00 +0800

Number Box Toys are children’s toys for children aged 1 to 4 years, designed to help children develop their cognitive and motor skills and learn about different number shapes and colors, including the number 0 to 9. The aim of developing this educational game prototype is to provide a visual image of the product and determine the production cost of the Number Box Toys product which is manufactured using 3D printing machine. Before making a prototype, Number Box Toys product design was created in 2D and 3D using Solidwork software, and then a Bill of Materials (BOM) and Operation Process Chart (OPC) were created. When producing the Number Box Toys prototype, simulation software was used using the Creality Slicer application to show the total time required to produce a Number Box Toys product, which was approximately 1803,78 minutes or 30,063 hours. The total time required to complete the entire operation process chart of Number Box Toys is 1822,78 minutes or about 30,38 hours, with details of 57 operation processes and 18 inspection processes. The results of calculating the production cost of the Number Box Toys educational game based on the total time required, material prices and labor costs resulted in a production cost value of Rp 404.690,89 and the selling price is Rp 465.383,03 with a profit of 15% of the cost price is Rp 60.702,13. There is a significant price difference compared to similar products sold on the market because Number Box Toys’ product prototype is made using 3D printing process, which requires a lot of time to make each part but has a size or shape that can be customized to suit the consumer.

Perancangan Tata Letak Fasilitas Gudang Komponen Perawatan Kereta LRT Jabodebek dengan Metode Class Based Storage (Studi Kasus: PT INKA)

Budiani Fitria Endrawati, Aditia Aria Maulana, Adiek Astika Clara Sudarni — Sun, 30 Jun 2024 00:00:00 +0800

PT Industri Kereta Api (INKA) Madiun is a railroad manufacturing company that produces trains and provides train maintenance guarantee services, one of which is to PT LRT Jakarta. The problem is that PT LRT Jakarta does not yet have a warehouse to store components for train operational and maintenance needs, so it takes time for delivery from PT. INKA Madiun to PT LRT Jakarta. This research aims to create a design and proposal for the layout of warehouse facilities in accordance with the train maintenance components at PT INKA which produces Jabodebek LRT trains. The method used is class-based storage to determine the class arrangement of each component, the rectilinear distance method to determine the distance of component movement, average speed to determine component movement time, and material handling costs to determine the total material handling cost. The results obtained show that class A is for tools components, class B is for electrical and mechanical components, and class C is for chemical, nonchemical and change unit components. The operator movement distance is 198.71 m, the forklift movement distance is 23.35 m, the operator movement time is 28,196.9 seconds, and the forklift movement time is 2,019.9 seconds for layout 1, while for layout 2 it is known that the operator movement distance is 197.60 meters, the forklift moving distance is 16.12 meters, the operator moving time is 27,889.9 seconds, and the forklift moving time is 963 seconds. The material handling costs obtained from the two layouts are Rp. 668,821,576. The layout also considers shelf dimensions, pallet dimensions, forklift dimensions, operator dimensions, door dimensions and the space of each component. The conclusion of this research is that the facility layout design is appropriate based on the class of each train maintenance component and the proposed layout chosen is layout 2 because the component movement distance and component movement time are smaller than layout 1.

Identifikasi Jenis, Pemetaan, dan Penanganan Limbah Bahan Berbahaya dan Beracun Pada PT Kaltim Parna Industri

Novia Setyawati, Nia Febrianti — Sun, 30 Jun 2024 00:00:00 +0800

PT Kaltim Parna Industri is a business entity engaged in the petrochemical industry which has the potential to produce hazardous and toxic waste (B3). This study aims to determine the type, mapping, and handling of hazardous and toxic waste (B3). The research method is by conducting a literature study and collecting existing data in the form of documents from companies and documentation. Based on the results of identification of the types, mapping, and handling of hazardous and toxic waste at PT Kaltim Parna Industri, it can be concluded that there are types of B3 waste generated from specific sources, and non-specific sources belonging to category 1 and category 2. The waste generated comes from activities in the process and utility areas. The handling that has been carried out when there is a potential for liquid B3 waste spills is by providing spill kits in the form of universal spill kits and chemical spill kits. Meanwhile, solid B3 waste can be disposed of in a special B3 waste bin that has been provided in the factory field area or directly to the B3 waste TPS.

Effect of Quench Temper and Annealing to The Mechanical Properties and Microstructure of Stainless Steel for Electronic and Biomedical Application

Abdul Aziz — Sun, 30 Jun 2024 00:00:00 +0800

The change of mechanical properties and microstructure occur in austenitic stainless steel thin metal foil SUS 316. The occurence studied after quench tempering treatment at 900oC to the Stainless Steel thin metal foils and holded for 1 hour, 2 hour and 3 hours. The experiment subjected to the stainless steel thin metal foils with fine grains and coarse grains. Based on SEM-EBSD investigation, No. martenstic phase transformation (MPT) occur in the microstructure of SUS 316 thin metal foils. The change of microstructure indicated by the change of grain misorientation (GMO) in the grain of SUS 316 thin metal foils. The hardness increase according to the increasing the holding time. The increase of the hardness in SUS 316 thin metal foils have dependency with the surface roughening behavior in thin metal foils. The surface roughening has great effect to the formability of thin metal foils SUS 316. The other findings are the surface surface roughening decrease with the increase of the hardness of SUS 316 thin metal foils. In other words, the surface roughening decrease according to the increase of the holding times.

Key Words : Microstructure; Grain Misorientation (GMO); Fine Grains, SEM-EBSD; Coarse Grains

Design for Monitoring and Controlling Temperature, pH and Water Turbidity in Smart Aquariums

Amalia Rizqi Utami, Muhamad Erlangga, Kharis Sugiarto — Sun, 30 Jun 2024 00:00:00 +0800

Fish is a food source that is easily obtained in Indonesia, fish can not only be found in rivers and the sea. Along with developments in technology, fish can be cultivated at home with limited land. In fish farming, water quality has a major influence on fish production. There are several parameters that can be used as a reference to determine whether water is said to have good quality, namely temperature, pH and water turbidity. In this research, ESP32 is used as a microcontroller to process the readings of the temperature sensor DS18B20, pH sensor and TDS sensor in the aquarium, with data that can be monitored via LCD and smartphone. This tool can set the pump ON/OFF based on predetermined water condition parameters. The comparison results between aquariums that use smart aquariums and aquariums that do not use smart aquariums show that using smart aquariums is more effective in maintaining water quality (pH 6.8, temperature 29.4ºC, turbidity 96 ppm) compared to not using smart aquariums (pH 3.5, temperature 28.9ºC, turbidity 178 ppm). Using a smart aquarium is also more efficient because it only consumes an average of 64.6 watts per day with a monthly cost of IDR 2,798, compared to a continuous pump which consumes 324 watts per day with a monthly cost of IDR 14,035. So pumps controlled by smart aquariums can better maintain water quality and save electricity costs.