scholarly journals Analysis of the Problem of Staff Allocation to Work Stations

2019 ◽  
Vol 1 (1) ◽  
pp. 545-550
Author(s):  
Marek Krynke ◽  
Krzysztof Mielczarek ◽  
Alan Vaško
Keyword(s):  
Mathematical Model ◽  
Production Line ◽  
Production Capacity ◽  
Organization Of Work ◽  
Machine Operation ◽  
Staff Allocation ◽  
Starting Point ◽  
Personnel Allocation ◽  
The Mathematical Model

Abstract The proper organization of work is to set the workflow to the slightest effort of man and machine operation to obtain maximum results. The article presents the problem of the allocation of personnel that occurs in a real company. The mathematical model for this issue was formulated. An algorithm solving the problem of personnel allocation is presented. The proposed analysis is a starting point for determining the production capacity and load of each workstation, which is particularly important when using multi-station work and balancing the production line.

scholarly journals Cost Optimization and Risk Minimization During Teamwork Organization

2021 ◽  
Vol 29 (2) ◽  
pp. 145-150
Author(s):  
Marek Krynke ◽  
Krzysztof Mielczarek ◽  
Olga Kiriliuk
Keyword(s):  
Mathematical Model ◽  
Cost Optimization ◽  
Health And Safety ◽  
Worker Safety ◽  
Simultaneous Optimization ◽  
Risk Minimization ◽  
Staff Allocation ◽  
Safety Risks ◽  
Starting Point ◽  
Personnel Allocation

Abstract In the paper the problem of personnel allocation under threat was presented. The possibilities of undertaking optimization measures in the process of workers’ health and safety and expenses incurred were emphasized. A mathematical model for this issue has been formulated. An algorithm solving the problem of staff allocation was presented. The evaluation criterion for this assignment was the minimization of worker safety risks. Simultaneous optimization of expenses incurred in the implementation of production tasks was taken into account. The productivity of the staff and all existing jobs with the skills of the employees also was considered. This problem was solved using GNU Octave. The example presented in the paper shows that in case of the most unfavorable allocation of tasks to employees, it will lead to a significant reduction in profits and may increase the risk of undesirable situations. The proposed analysis is the starting point for determining the risk in case of multi-position work.

Data-Enabled Modeling and Performance Evaluation of Multistage Serial Manufacturing Systems With Quality Rework

2020 ◽  
Author(s):  
Cheng Zhu ◽  
Tian Yu ◽  
Qing Chang ◽  
Jorge Arinez
Keyword(s):  
Mathematical Model ◽  
Production Line ◽  
System Performance ◽  
Manufacturing Systems ◽  
Serial Production ◽  
Stochastic Production ◽  
And Performance ◽  
Event Based ◽  
The Mathematical Model ◽  
Permanent Production

Abstract In a multistage serial production line, products with defect can be repaired or reworked to ensure high product quality. This paper studies a multistage serial manufacturing system with quality rework loops. Rework is the activity to repair or repeat the work on the defect parts during manufacturing processes, and it adds to cost and cycle time. This paper introduces an event-based data-enabled mathematical model for a stochastic production line with quality rework loops. The system performance properties are analyzed and permanent production loss due to quality rework loops is identified. The mathematical model and system performance identification methodology are studied analytically through numerical case studies.

scholarly journals Procedure for the quantification of the degradation index of Photovoltaic Generators

2021 ◽  
Vol 2 (2) ◽  
pp. 47-53
Author(s):  
Proenza Y. Roger ◽  
Camejo C. José Emilio ◽  
Ramos H. Rubén
Keyword(s):  
Mathematical Model ◽  
Power Generation ◽  
Solar Energy ◽  
Operating Conditions ◽  
Energy Research ◽  
Degradation Index ◽  
Starting Point ◽  
Santiago De Cuba ◽  
Photovoltaic Generators ◽  
The Mathematical Model

A procedure is presented for the quantification of the degradation index of Photovoltaic Generators, based on the quantification of the operational losses inherent in the system, which allows maintaining the nominal operating conditions and by the warranty terms of the photovoltaic generator. A photovoltaic generator connected to the network with a nominal power of 7.5 kWp, installed in the Solar Energy Research Center of Santiago de Cuba, is used to evaluate and validate the procedure. The starting point is the mathematical model of the photovoltaic generator, then the operational losses of the photovoltaic generator are quantified and the mathematical model is adjusted to real conditions, through a polynomial adjustment.  The results obtained show that the photovoltaic generator presents deviations in terms of the nominal power generation, because the operational losses are 7% with respect to the values ​​given by the manufacturer.

Research on Component Allocation Problem for Chip Mounter Based on MATLAB

2014 ◽  
Vol 971-973 ◽  
pp. 663-667
Author(s):  
Xuan Jun Dai
Keyword(s):  
Mathematical Model ◽  
Natural Selection ◽  
Production Line ◽  
Surface Mount Technology ◽  
Efficiency Improvement ◽  
Component Distribution ◽  
Competitive Strength ◽  
Component Allocation ◽  
Short Time ◽  
The Mathematical Model

With the widespread use of the Surface Mount Technology (SMT) in electronics assembly, the efficiency of SMT production line is the most important to increase the number of products quickly, enhance the market share and competitive strength. And the key point of efficiency improvement for SMT production line is the reasonable component distribution in chip mounter. In this paper, for a widely used SMT production line, its mathematical model of component distribution for two chip mounters was established. By identifying the model constrains and processing of the mathematical model, then the mathematical model was solved through Particle Swarm Optimization (PSO) based on natural selection with MATLAB. By contrast with the MATLAB function-bintprog solving, the results by PSO based on natural selection needs less iteration and short time, and the optimal component distribution program was efficiently obtained.

scholarly journals Research on 760mm Hot Tandem Mill Hydraulic AGC Control System

2011 ◽  
Vol 2-3 ◽  
pp. 18-23
Author(s):  
Kun Tong ◽  
Ni Ke ◽  
Ming Zhe Che ◽  
Jin Сhun Song
Keyword(s):  
Mathematical Model ◽  
Working Conditions ◽  
Production Line ◽  
Hydraulic System ◽  
Pid Controller ◽  
Sheet Thickness ◽  
System Response ◽  
Fuzzy Pid ◽  
Fuzzy Pid Controller ◽  
The Mathematical Model

Through analyzing the 760mm hydraulic AGC production line of a Shandong factory, the characteristics, compositions and the mathematical model of hydraulic system of the hydraulic AGC are introduced. Based on those the system performance is analyzed on the working conditions by simulations through introducing the PID and fuzzy PID controller. The simulation analysis concluded that the system response time and overshoots with the fuzzy PID controller were better than before, which is in flavor of the production line commissioning and eventually running. The performance of AGC system affects the controlling accuracy of sheet thickness and yield of sheet directly. In order to accommodate the requirement of market and improve the competition of product, a steel plant from Shandong province entrusts relevant department to develop a set of hydraulic system, which is being debugged at present. Our paper mainly introduces the structure and feature of the system. With the mathematical model that accord with the working conditions being founded and PID and fuzzy PID based on the mathematical model being added, We have simulated the system using the software of MATLAB/SIMULINK, which supplies corresponding theoretical basis for the system’s final operation [1].

scholarly journals CONSTRUCTING A MODEL OF VIBROSEIS SIGNAL COMPLICATED BY HARMONICS

2020 ◽  
Vol 1 (1) ◽  
pp. 72-83 ◽  
Author(s):  
M. S. Denisov ◽  
A. A. Egorov
Keyword(s):  
Mathematical Model ◽  
Basis Function ◽  
Harmonic Distortion ◽  
Frequency Range ◽  
Frequency Dependent ◽  
Function Decomposition ◽  
Starting Point ◽  
Processing Algorithms ◽  
The Mathematical Model ◽  
Basis Decomposition

We solve the problem of constructing the mathematical model of a vibroseis signal distorted by harmonics. Basis function decomposition is used for the approximation. The basis decomposition coefficients are frequency-dependent, i. e. filters are applied instead of multipliers. The resulting model will be the starting point for further research aimed at developing processing algorithms for the suppression of harmonic distortion, or for utilizing the harmonics to extend the frequency range of the signal.

scholarly journals Risk Management in the Process of Personnel Allocation to Jobs

2020 ◽  
Vol 2 (1) ◽  
pp. 82-90
Author(s):  
Marek Krynke
Keyword(s):  
Mathematical Model ◽  
Risk Management ◽  
Safety Management ◽  
Acceptable Level ◽  
Management Process ◽  
Quantitative Expression ◽  
Planning And Control ◽  
Starting Point ◽  
Personnel Allocation ◽  
And Control

AbstractThe strategy should be designed in such a way as the risk management can operate not only as a system for avoiding losses, but also risk management should allow recognizing and making use of occasions and create new opportunities for the organization. Risk management includes both an evaluation (analytical and evaluation) undertaking as well as planning and control activities aimed at minimizing (reducing) risk or maintaining it at an acceptable level. Security management can in particular be reduced to the issue of risk management, because risk is a quantitative expression of the functioning of systems in an environment where there are active sources of threats to system security. The article presents the problem of personnel allocation in hazardous conditions, emphasizing the possibilities of undertaking optimization actions in the safety management process. A mathematical model was formulated for this issue. An algorithm solving the problem of personnel allocation is presented. The proposed analysis is the starting point for determining the risk when using multi-station work.

Forecasting Watercooling in the Kattegat, the Öresund, the Belt Sea and the Arkona Basin

1987 ◽  
Vol 18 (4-5) ◽  
pp. 247-258
Author(s):  
Anders Omstedt
Keyword(s):  
Mathematical Model ◽  
Surface Water ◽  
Simulated Data ◽  
Diagnostic Study ◽  
Water Cooling ◽  
The Baltic Sea ◽  
Starting Point ◽  
Arkona Basin ◽  
The Baltic ◽  
The Mathematical Model

Some problems associated with forecasting water cooling in the entrance to the Baltic Sea are examined, using a diagnostic study from the severe ice winter of 1986/87 as a starting point. In the study, measured and numerically simulated data demonstrate that surface water cooling can be well simulated with the mathematical model presented by Omstedt (1987). Forecast tests during the same winter also indicate that the model may provide useful forecast information. However, because of the limited numbers of temperature and salinity profile measurements, the forecasts had to be accomplished with diagnostic calculations. These calculations will then produce the necessary initial data for the forecasts.

scholarly journals Thinking Skills in Problem Solving: Pre-Knowledges

2019 ◽  
Author(s):  
Ignacio Laiton
Keyword(s):  
Higher Education ◽  
Mathematical Model ◽  
Problem Solving ◽  
Thinking Skills ◽  
Theoretical Knowledge ◽  
Pedagogical Strategies ◽  
Electrical Physics ◽  
Physics Students ◽  
Starting Point ◽  
The Mathematical Model

The present article shows the results of a study aimed at evaluating the way in which physics students of first semesters use the thinking skills in problem solving. We speak of pre-knowledge in terms of prior theoretical knowledge of an area of ​​knowledge, in this case it is about identifying pre-knowledge in the case of thinking skills for students who have recently entered higher education. At present, the teaching of thinking skills is considered one of the main characteristics of education for the 21st century. An instrument of ten problems submitted to expert judgment was designed to be applied during the academic semester to the students of electrical physics of two Colombian universities during the years 2016 and 2018.   Are evaluated the categories of description, representation, identification of relationships, use of the mathematical model and  drawing conclusions for each of the problems. The results show statistically a very low starting point in the ability to use such skills, and is in turn a reflection element for the design of effective pedagogical strategies in solving problems in physics in higher education.

scholarly journals Planning of production capacities of a high-tech enterprise based on the mathematical model of the Pontryagin maximum

Upravlenie ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 60-70
Author(s):  
A. A. Sazonov
Keyword(s):  
Mathematical Model ◽  
Production Capacity ◽  
Production Equipment ◽  
High Tech ◽  
Production Program ◽  
Current Production ◽  
New Type ◽  
Time Required ◽  
Production Capacities ◽  
The Mathematical Model

The article considers the method of planning the production capacity of a high-tech enterprise based on the application of the Pontryagin maximum mathematical model. The presented method is aimed at increasing the productivity of the equipment installed at the enterprise, in order to optimize the time spent and the volume of products produced. The study analyses the activities of research and production enterprise in order to improve the level of efficiency of production capacity management. The purpose of the research is to organize an effective process of planning production capacities of a high-tech enterprise based on the application of the Pontryagin maximum mathematical model, which allows you significantly to increase not only equipment performance indicators, but also optimize the time required to complete the current production program. The author tested the algorithms, models and methods proposed in the article at a research and production enterprise engaged in the production of high-tech products. The use of the obtained models will allow you to optimize peak loads in the current production program at the enterprise, reduce the labor intensity indicators in the annual production plan, determine the necessary amount of production equipment, which will eventually reduce the amount of necessary investments. The paper gives a practical example of the organization of a new type of production aimed at manufacturing various parts of complex shape.

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