Optimization of Liquid Oxygen Distribution Routes in Demand Conditions at Risk of Change After the Fleet Departs for the Agents

This study addresses vehicle routing to distribute liquid oxygen products from the factory to the agent by considering the risk of changes in liquid oxygen demand when the vehicle leaves the factory. Handling liquid oxygen inventory requires strict service, large storage areas and high storage costs. The uncertainty of liquid oxygen demand at the consumer level and inventory handling make agents change demand suddenly. This condition causes the quantity transferred to the agent not to match the amount of liquid oxygen transported by the fleet from the factory. If the change in demand decreases, the fleet must return the remaining liquid oxygen to the factory. Still, if the change increases, it will affect the vehicle's ability to meet the liquid quantity requested by the next agent. Furthermore, a vehicle routing model is developed that considers the possibility of changes in demand after the vehicle departs from the factory. The search for the optimal route solution for this model uses a guided local search algorithm. The study results showed an increase in vehicle transfer quantity of 4.23% from the previous route

Analysis of the Causes of Defect and Proposed Improvements with Fault Tree Analysis Method in the Drawing Process at PT. XYZ

PT. XYZ is a manufacturing company that produces various types of metal-based products with a make toorder system. One of them is the Back Top Plate 450/456 (BTP 450/456) part which is a component ofrefrigerators. In the period of February-November 2020, PT. XYZ produces 15,395 units of BTP 450/456.However, BTP 450/456 products have the highest percentage of defective products. The average percentageof defective products is 3.06%, while the tolerance for the number of defects determined by the company is1%. This indicates a problem in the production process. The most types of defects in the production processof 450/456 are broken with a percentage of 41.88%. Based on Critical to Quality, the process stages that donot meet the requirements in the drawing process can cause various types of defects, such as wrinkles, breaks,miss-sizing, process failures, scratch and dents. The Fault Tree Analysis method is used to identify the rootcause of the type of broken defect. The root of these problems includes the absence of a guide for settingdies, the machine being operated for a long time, operator negligence, and the incorrect position of theplastic. The proposed improvement given are determining the optimal engine pressure, designing dies settingguides for operators, evaluating and improving the maintenance process, analyzing new machinerequirements, supervisors giving good directions to operators, periodic work evaluations to assess operatorperformance, designing visual displays as reminders for operators, and designing aids for positioning plasticson materials

The Application of Template Matching Algorithm to Improve Accuracy of Plate Number Recognition

Pattern Recognition is a part research of Image Processing. In term implementation of Pattern Recognitionused for variety research needs such as Identify Transportation License Plate Number. Identifying licenseplate number is one process to reduce crime, accident, and support related agencies to process informationtraffic data. Taking picture of license plate number by camera create image that can be processed by OpticalCharacter Recognition (OCR). OCR is conversion process of picture that contain alphabet and numericobject into ASCII character. In creating of OCR, there’s many kind of algorithm, we used TemplateMatching algorithm as main research. Process of Template Matching algorithm is fitting all part of picturetaken by camera with image that has been processed into Template Data. However like another algorithm,this algorithm had a deficiency about accuracy and time to recognition process. To create and enhance ofaccuracy in Template Matching algorithm, we create 3 scenarios to take a picture for compare the result ofaccuracy and time to OCR process also comparing Template Matching algorithm with Learning VectorQuantization (LVQ) as accuracy comparison method. Based on result of Template Matching algorithm had84% accuracy and 0,942 Milliseconds to process OCR

Bubble Window Product Quality Control with New Seven Tools Method (Case Study: PT X)

Quality control is needed to prevent material, time, and energy losses for the company PT. X. By doingquality control on bubble window production, it is expected to reduce the adverse impact on the company.PT. X itself is a company engaged in aircraft manufacturing. In producing each aircraft component, PT. Xrequires quality control to be able to guarantee the aircraft has good quality and meets the standards thathave been set. In bubble window production, defects are still found. Bubble window itself is one of thecomponents of the aircraft which is produced by PT. X. In an effort to reduce the number of defects thatoccur, quality control is carried out using the new seven tools method. From the processing results obtainedfive factors that cause defects in bubble window products at PT. X, namely the environment, humans,machines, methods, and materials. So three solutions are proposed,which are reviewing the operation of themachine, placing the SOP position in the work area, and periodic maintenance

Analysis and Evaluation of File Storage and Back Up of Disaster Risk in Diskominfo Data Center

Disaster is a very damaging and unpredictable event when it happens, threatening the facilities of computersystems and the environment, such as telecommunications systems and data storage. According to theNational Disaster Management Agency (BNPB) Indonesia is very vulnerable to disasters because of thegeographical characteristics. Indonesia current position is between three active plates and a ring of fire.Indonesia's reputation as a disaster-prone country is also noted in the report of The Atlas of the HumanPlanet 2017. The data shows that the threat of natural disasters has doubled in the last 40 years, in line withthe population growth. Diskominfo West Java is an agency that is tasked with carrying out regionalgovernment affairs in West Java in the field of communication and information technology based on theprinciples of autonomy, deconcentrating and co-administration. Diskomifo has a data center that is usefulfor the benefit of the information itself and the Regional Work Unit (SKPD) of the West Java provincialgovernment. A data center must be designed as best as possible to avoid disruption due to disasters,disturbances or errors that can cause damage to the data center itself, therefore it must be avoided orminimized from the impact of the risks that occur and guarantee the availability of the organization'sbusiness continuity if interference or disaster is occurred. In this study, an analysis was carried out relatedto the assessment of risk occurrence, to determine the level of the threats. In addition, in this document abusiness impact analysis is also carried out to determine the priorities of the information system owned bythe organization, so that the organization can prioritize which information system is in the top prioritywhen disruptions occurred

Designing SOP for Quality Document Control in Rumah BUMN Bandung using Business Process Management Method

The role of Micro, Small and Medium Enterprises (MSMEs) is very important for a region, especially asone of the drivers of economic growth in the region. In order to create efficiency, wider market reach,attract more customers and better business opportunities, MSMEs must enter the digital businessecosystem. Rumah BUMN (RB) is an initiative program of BUMN and the Ministry of BUMN tostrengthen Micro, Small and Medium Enterprises (MSMEs). Rumah BUMN Bandung is one of the activeRumah BUMN and there are many activities under the auspices of Bank BRI. As the digital businessecosystem develops, more and more MSMEs are joining Rumah BUMN Bandung. Implementation ofdocumentation at Rumah BUMN Bandung only reached 12.5%, mainly focused on training programs outof a total of 8 existing programs. The reason is that there is no comprehensive implementation of qualitydocument control standards at Rumah BUMN Bandung. As a result, Rumah BUMN Bandung employeesoften have difficulty finding documents, sometimes documents that have expired are still being used, andthey make mistakes in providing documents to fellow employees. This research aims to describedocuments that need to be controlled, design SOPs for quality document control, and create use casediagrams. The method used in this research is Business Process Management (BPM). In an effort to dealwith existing problems, SOPs and use case diagrams of the quality document control process will bedesigned

Recommendations to Reduce Cybersickness in Virtual Reality Based on User’s Personality and Eye Health

The use of Virtual Reality (VR) technology is closely related to Cybersickness (CS), namely a feeling ofdizziness that arises due to differences in perception between what is felt and seen. Other research showthat personality and eye health can affect a person's perception thus affecting the level of CS felt. The studyaims to identify the relationship between personality and eye health on CS and make recommendations toreduce for gaming industries. The research was conducted with within-subject experimental design with twovariables, personality and eye health. The initial study made an experimental design which was followed bya pilot study to determine the minimum sample size for the study and improvements to the experiment.Furthermore, participant data was collected in the form of personality, eye health, completion time, andVirtual Reality Sickness Questionnaire (VRSQ) score. Data was collected from 36 participants and thenprocessed statistically. The data were tested for classical assumptions and searched for their relationship withthe two-way ANOVA. After knowing the existence of a relationship, a Post-hoc Test (Tukey's Test) wasconducted to find the most significant group. The results shows that there was a significant relationshipbetween personality and eye health on CS (P-Value < 0.05), where participants with introvert personalityand abnormal eye conditions are more vulnerable. From the results of the study, it is recommended thatsettings be made to reduce screen shakes, limit playing time, choose the right game, and do oculomotorexercises before playing

The Covid-19 Presence Monitoring System in Water uses Biosensors and Artificial Intelligence based on the Internet of Things

Water is a source of life for humans, therefore its quality needs to be maintained in order to avoidcontamination of COVID-19. Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) orCOVID-19 is a pandemic virus that attacks the respiratory system and it is contagious to humans.Therefore, we need a system that can monitor and detect this virus in surface water sources. Earlydetection of water contaminated by COVID-19 is important to solve problems in handling the quality ofwater contaminated with the virus or not. The proposed monitoring system consists of several tools andprocesses including biosensors, microcontrollers, classification using K Nearest Neighbor (K-NN) todetect contaminated water or not, and firebase as data storage. Classification results are stored in firebaseand displayed on the frontend application based on the web. The frontend application can be accessed bythe user. The frontend application also displays a graph that describes the water content periodically and areference for the location of the water area contaminated by the virus is displayed

Total Productive Maintenance Analysis of Wrapping Machine Line 4 through Overall Equipment Effectiveness and Six Big Losses at PT XY, Cirebon – West Java

PT. XY is a company engaged in the food industry, namely instant noodles. The problem encountered atPT XY was that one of the machines that used in instant noodle production often stopped operating due toa breakdown. The machine that often experiences breakdowns is the Wrapping Line 4 machine, which is apackaging machine for cup noodle products. This results in a long machine downtime so that theproduction target is not achieved. One approach to addressing this problem is Total ProductiveMaintenance (TPM) which is measured through Overall Equipment Effectiveness (OEE) and Six BigLosses. This study aims to calculate the Overall Equipment Effectiveness (OEE) value, calculate the valueof the Six Big Losses factor and determine the root cause of the dominant problem of the Six Big Lossesfactor using a fishbone diagram. The calculation results show that the OEE value on the Wrapping Line 4is below the international standard, which is 78.03%. Dominant factors that cause machine effectivenesswas low are quality defect losses by 63,54% and reduce speed losses by 24,87%

Optimization of Component Transportation Costs with Narrow Service Time Window and Heterogenous Vehicle Capacity

Transportation costs are one of the largest cost components in distribution activities.Transportation costs can be reduced by improving distribution routes. The aims of this articleare to minimize transportation costs by determining vehicle assignments and routing forheterogeneous vehicles. The constrains that considered are the number and capacity of thevehicle, fuel consumption, service time at the company and at customers plant. Totaltransportation costs are considered as vehicle fixed costs, fuel costs, and material handling costs.CVRPTW is applied to the problem of assigning and determining vehicle routes of plasticcomponent companies that supply plastic components for various manufacturing companies inthe Greater Jakarta area. CVRPTW can reduce transportation costs in the company while stillmeet all applicable constraints. CVRPTW reduced the number of vehicles used from theprevious 6 vehicles to 5 vehicles. Total transportation costs for all shipping routes are Rp.4,563,620. This cost is lower than the company costs of Rp. 4,694,100, this routing problemreduces transportation costs by 8% of the initial cost