Integration of Simulation Modeling and Comparison of Scheduling Methods to Minimize the Makespan in a Printing Industry

2012 ◽  
Vol 488-489 ◽  
pp. 1119-1124
Author(s):  
V. Govindarajalu ◽  
V.S. Senthil Kumar
Keyword(s):  
Real Time ◽  
Completion Time ◽  
Flow Shop ◽  
Discrete Event ◽  
Real Life ◽  
Simulation Software ◽  
Printing Industry ◽  
The Real ◽  
Tardy Jobs ◽  
Maximum Occupancy

This paper considers the problem of scheduling production activities in a real-life printing industry. The problem is modeled as a two-stage flexible flow shop problem with minimization of the makespan and the number of tardy jobs as the objective. Discrete event simulation has been performed using Extend simulation software to depict the real time model of the print industry. The setup time, processing time and completion time of the prioritized customers were obtained and validated with the real time industry inputs. After validation, the output of simulation data has been used to perform preliminary scheduling experiments. This paper deals with the comparison of three scheduling algorithms such as earliest completion time first (ECT), Earliest start time first (EST) and PCmax algorithm for the calculation of maximum occupancy time of various printing jobs. The results obtained using PC max shows the reduced make span of the printing jobs compared to other two algorithms with approximately 12% improvement in minimizing the makespan. Hence the P||Cmax scheduling method can be implemented in the industry to minimize the maximum occupancy time of a particular printing machine. This motivates the actual implementation of the proposed ILP (PCmax scheduling) procedure for the printing industry.

scholarly journals EXPLORATION OF E-LEARNING VS TRADITIONAL LEARNING IN INDIA

2020 ◽  
Vol 8 (2) ◽  
pp. 69-76 ◽  
Author(s):  
Gulbir Singh ◽  
Vivek Bhatnagar ◽  
Rajeev Gupta ◽  
Gautam Kumar
Keyword(s):  
Comparative Analysis ◽  
Real Time ◽  
Real Life ◽  
Research Data ◽  
University Education ◽  
Traditional Learning ◽  
Analysis Method ◽  
The Real ◽  
Huge Impact ◽  
E Learning

Purpose of Study: The purpose of the study is to carry out the comparison of traditional learning and e-learning with reference to university education. Methodology: A comparative analysis method that has been selected to fulfill the purpose of the study. The research data has been collected by various sources internet, previous research studies published in the Journal, universities which offer different technical and nontechnical programs .and further analyzed by in-depth understanding approach. Result: The outcome of this study will show the effect of e-learning in the current era. As we have compared e-learning with traditional learning and the result shows us that e-learning has filled the gap between the universities and the real-life industries' demands. Main finding: The result of this study showed that e-learning is the need of the present era in order to fulfill the gap between the universities and the real-life industries' demands. Additionally, e-learning based courses will have more impact and provide more skill and exposure to students as compared to traditional learning mode. Implications/Applications: This article can help the different universities and students to introduce more e-learning courses in their curriculum and they can fill the real-time industries' demands. Novelty/originality of the study: Our research can ensure that e-learning has a huge impact on our students and can help to increase the skills and exposure of them according to the current demands.

scholarly journals Impact of changes in the methodology of external price referencing on medicine prices: discrete-event simulation

2020 ◽  
Author(s):  
Sabine Vogler ◽  
Peter Schneider ◽  
Lena Lepuschütz
Keyword(s):  
Cost Containment ◽  
Discrete Event ◽  
Real Life ◽  
Base Case ◽  
Case Scenario ◽  
Medicine Price ◽  
Base Case Scenario ◽  
The Real ◽  
Methodological Choices ◽  
Medicine Prices

Abstract Background: Several governments apply the policy of external price referencing (EPR), which considers the prices of a medicine in one or more other countries for the purpose of setting the price in the own country. Different methodological choices can be taken to design EPR. The study aimed to analyse whether, or not, and how changes in the methodology of EPR can impact medicine prices.Methods: The real-life EPR methodology as of Q1/2015 was surveyed in all European Union Member States (where applicable), Iceland, Norway and Switzerland through a questionnaire responded by national pricing authorities. Different scenarios were developed related to the parameters of the EPR methodology. Discrete-event simulations of fictitious prices in the 28 countries of the study that had EPR were run over 10 years. The continuation of the real-life EPR methodology in the countries as surveyed in 2015, without any change, served as base case.Results: In most scenarios, after ten years, medicine prices in all or most surveyed countries were – sometimes considerably – lower than in the base case scenario. But in a few scenarios medicine prices increased in some countries. Consideration of discounts (an assumed 20% discount in five large economies and the mandatory discount in Germany, Greece and Ireland) and determining the reference price based on the lowest price in the country basket would result in higher price reductions (on average -47.2% and -34.2% compared to the base case). An adjustment of medicine price data of the reference countries by purchasing power parities would lead to higher prices in some more affluent countries (e.g. Switzerland, Norway) and lower prices in lower-income economies (Bulgaria, Romania, Hungary, Poland). Regular price revisions and changes in the basket of reference countries would also impact medicine prices, however to a lesser extent.Conclusions: EPR has some potential for cost-containment. Medicine prices could be decreased if certain parameters of the EPR methodology were changed. If public payers aim to apply EPR to keep medicine prices at more affordable levels, they are encouraged to explore the cost-containment potential of this policy by taking appropriate methodological choices in the EPR design.

Discrete Event Simulation Of The COVID-19 Sample Collection Point Operation

2021 ◽  
Author(s):  
Martina Kuncova ◽  
Katerina Svitkova ◽  
Alena Vackova ◽  
Milena Vankova
Keyword(s):  
Discrete Event Simulation ◽  
Waiting Times ◽  
Discrete Event ◽  
Real Data ◽  
Simulation Software ◽  
Sample Collection ◽  
The Real ◽  
Event Simulation ◽  
Collection Process ◽  
Collection Point

The year 2020 was very challenging for everyone due to the COVID-19 pandemic. Many people turn their lives upside down from day to day. Politicians had to impose completely unprecedented measures, and doctors immediately had to adapt to the huge influx of patients and the massive demand for testing. Of course, not all processes could be planned completely efficiently, given that the situation literally changes from minute to minute, but sometimes better planning could improve the real processes. This contribution deals with the application of simulation software SIMUL8 to the analysis of the COVID-19 sample collection process in a drive-in point in a hospital. The main aim is to create a model based on the real data and then to find out the suitable number of other staff (medics) helping a doctor during the process to decrease the number of unattended patients and their waiting times.

scholarly journals Real-Life Implementation of a GPS-Based Path-Following System for an Autonomous Vehicle

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3940 ◽  
Author(s):  
Alexander de Winter ◽  
Simone Baldi
Keyword(s):  
Real Time ◽  
Autonomous Vehicle ◽  
Tracking Error ◽  
Experimental Studies ◽  
Real Life ◽  
Path Following ◽  
Lateral Acceleration ◽  
The Real ◽  
Gps System ◽  
Toyota Prius

This work is meant to report on activities at TU Delft on the design and implementation of a path-following system for an autonomous Toyota Prius. The design encompasses: finding the vehicle parameters for the actual vehicle to be used for control design; lateral and longitudinal controllers for steering and acceleration, respectively. The implementation covers the real-time aspects via LabVIEW from National Instruments and the real-life tests. The deployment of the system was enabled by a Spatial Dual Global Positioning System (GPS) system providing more accuracy than the regular GPS. The results discussed in this work represent the first autonomous tests on the Toyota Prius at TU Delft, and we expect the proposed system to be a benchmark against which to test more advanced solutions. The tests show that the system is able to perform in real-time while satisfying comfort and trajectory tracking requirements: in particular, the tracking error was within 16 cm, which is compatible with the 13 cm precision of the Spatial Dual GPS, whereas the longitudinal and lateral acceleration are within comfort levels as defined by available experimental studies.

Using Discrete Event Simulation Software in a MET Program

2001 ◽  
Author(s):  
Alok K. Verma
Keyword(s):  
Discrete Event Simulation ◽  
Manufacturing Systems ◽  
Discrete Event ◽  
Real Life ◽  
Simulation Software ◽  
Computer Integrated Manufacturing ◽  
Student Interest ◽  
Technology Program ◽  
Event Simulation ◽  
Life Problems

Abstract Discrete event simulation software can be an effective tool for teaching comparative analysis of manufacturing systems for improving performance. ProModel software is used in a computer integrated manufacturing course in the Mechanical Engineering Technology Program for this purpose. Use of this tool allows an instructor to demonstrate the pros and cons of various manufacturing scenarios and recommend a solution. Student interest is enhanced by assigning simulation of real life problems from local industries.

ACO-Based Global Optimal Transportation Path

2012 ◽  
Vol 488-489 ◽  
pp. 1680-1683
Author(s):  
Wei Hua Zhu ◽  
Ying Shen
Keyword(s):  
Ant Colony Optimization ◽  
Real Time ◽  
Shortest Path ◽  
Real Life ◽  
Optimal Transportation ◽  
Time Analysis ◽  
The Real ◽  
Real Time Analysis ◽  
Global Optimal ◽  
Simulation Results

This paper discusses how to address some issues when contemplating the global optimal transportation path (GOTP) such as dynamics, the ability of real-time analysis as well as complexity of prediction. Using shortest path methodology, this paper abstracts the real-life problem to a graphic context. Based on the solution of ant colony optimization (ACO) algorithm, the simulation indicates that this manner is efficient and effective in dealing with these problems. The indicators utilized ACO are achieved through simulation results analysis, providing the range of exact elements.

scholarly journals A DEVS-based engine for building digital quadruplets

SIMULATION ◽  
2021 ◽  
pp. 003754972110031
Author(s):  
Daniella Niyonkuru ◽  
Gabriel Wainer
Keyword(s):  
Real Time ◽  
Formal Model ◽  
Formal Analysis ◽  
Discrete Event ◽  
Physical World ◽  
Common Mechanism ◽  
The Real ◽  
Event Modeling ◽  
Definition Of ◽  
Time Systems

Development of Embedded Real-Time Systems is prone to error, and developing bug-free applications is expensive and no guarantees can be provided. We introduce the concept of Digital Quadruplet which includes: a 3D virtual representation of the physical world (a Digital Twin), a Discrete-Event formal model of the system of interest (called the “Digital Triplet”), which can be used for formal analysis as well as simulation studies, and a physical model of the real system under study for experimentation (called the “Digital Quadruplet”). We focus on the definition of the idea of a Digital Quadruplet and how to make these four apparati consistent and reusable. To do so, we use the Discrete-Event formal model as a center for both simulation and execution of the real-time embedded components with timing constraints, as well as a common mechanism for interfacing with the digital counterparts, providing model continuity throughout the process. Here we focus on a principal part of the Digital Quadruplet idea: the provision of an environment to allow models to be used for simulation (in virtual time), visualization, or execution in real-time. A Discrete-EVent Systems specifications (DEVS) kernel runs on bare-metal hardware platforms, avoiding the use of an Operating RTOS in the platform, and the combination with discrete-event modeling engineering.

scholarly journals Using Online Bees Algorithm for Real-time Permutation Flow Shop Problem in Car Disassembly Line

2021 ◽  
Author(s):  
murat sahin ◽  
Wang Chao
Keyword(s):  
Real Time ◽  
Flow Shop ◽  
Bees Algorithm ◽  
Specific Sequence ◽  
The Real ◽  
Time Value ◽  
Initial Stage ◽  
Permutation Flow Shop ◽  
Flow Shop Problem ◽  
Disassembly Line

Abstract The automobile disassembly line is a typical permutation flow shop problem (PFSP). In the automobile disassembly line, the goal of the research is to minimize the completion time of scheduling with optimizing the disassembly order of vehicles. However, disassembly time was uncertain at the initial stage as the consuming time of cars’ specific sequence only could be roughly estimated, which make the PFSP in automobile disassembly line unlike the traditional ones. In this study, the real-time PFSP problem in automobile disassembly line was defined and well solved with the proposed online Bees Algorithm (O-BA). The algorithm has been prepared in Matlab/Simulink to work in real-time. Time consumed by each component of each vehicle was roughly estimated based on engineer’s experience. First optimisation was carried out to decide the disassembly order of vehicles to be disassembled. When each component was disassembled, the real consuming time value was updated with the detecting system which was realized in Simulink. Then the O-BA was activated and created the new solution for the disassembly order of vehicles which were still not entering the disassembly line. The proposed O-BA algorithm has an online structure and conducted the optimisation with distinguishing whether the vehicles to be disassembled were entering the disassembly line. The result shows the O-BA with the detecting system was succeeded in realizing real-time PFSP in the disassembly line. Moreover, the method proposed in this study was suitable for solving the same kind of real-time PFSP in the assembly line or disassembly line.

scholarly journals Rendering the Real-Time Caustics with DirectX Raytracing

2021 ◽  
Author(s):  
Egor Komarov ◽  
Dmitry Zhdanov ◽  
Andrey Zhdanov
Keyword(s):  
Real Time ◽  
Virtual World ◽  
Real Life ◽  
Light Sources ◽  
Arbitrary Geometry ◽  
The Real ◽  
Virtual Camera ◽  
Current Article ◽  
Game Industry ◽  
Rendering Pipeline

Caustic illumination frequently appears in the real life, however, this type of illumination is especially hard to be rendered in real-time. Currently, some solutions allow to render the caustic illumination caused by the water surface, but these methods could not be applied to the arbitrary geometry. In the scope of the current article, we present a method of real-time caustics rendering that uses the DirectX Raytracing API and is integrated into the rendering pipeline. The method is based on using additional forward caustic visibility maps and backward caustics visibility maps that are created for light sources and the virtual camera correspondingly. The article presents the algorithm of the developed real-time caustics rendering method and the results of testing its implementation on test scenes. The analysis of the dependence of the rendering speed on the depth of specular ray tracing, the number of light sources, and the number of rays per pixel is carried out. Testing shows promising results which can be used in the modern game industry to increase the realism of the virtual world visualization.

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