The Optimization of Mechanized Earthwork Processes

2016 ◽  
Vol 820 ◽  
pp. 96-101 ◽  
Author(s):  
Lucia Paulovičová
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Models ◽  
Decision Maker ◽  
Multicriteria Optimization ◽  
Optimization Process ◽  
Multicriteria Method ◽  
Wise Decision ◽  
The Right ◽  
The Cost ◽  
Selection Of

Earthwork processes are the most costly and time consuming component of construction these days and they are characterized by a powerful heavy mechanization which participate on the earthwork process. Current pressure for minimize the cost and maximize the productivity highlights the need to optimize earthworks. In this paper, the optimization process in the area of earthwork processes is described. The selection of the right types of machines for earthwork and its implements has become very difficult these days because of availability of variety of machines models and therefore a multicriteria method is presented to tackle the problem. This paper describes methodology for optimizing the earthwork process according to the selected optimal criteria. The methodology is focused on the proposal phase of optimization where the decision maker has to make a decision and choose the right type of excavators. To overcome the problem of comparing the chosen machines a mathematical modeling approach leading to multicriteria optimization was adopted to make the step wise decision. The methodology gives an mathematical models by which we can solve this problem.

The Evaluation of Surface Quality for Particular Parts of Forging Die

2015 ◽  
Vol 818 ◽  
pp. 268-271
Author(s):  
Peter Ižol ◽  
Jozef Beňo
Keyword(s):  
Tool Wear ◽  
Production Process ◽  
Surface Quality ◽  
The Other ◽  
Connecting Rod ◽  
Production Effectiveness ◽  
The Right ◽  
The Cost ◽  
Forging Die ◽  
Selection Of

Forming dies are often costly for producers and the cost amount is influenced by production process too. If the die is manufactured by machining, proper strategies would necessary to consider as well. The right selection of adequate strategy helps production times shortening, tool wear reducing and those affect production effectiveness. Used strategies and its parameters are often compromise between acceptable surface quality and variations in shape aside, and production time on the other side. The paper presents the way of evaluation of milling strategy based on selected elements of forming die. This allows choosing the adequate strategy for particular shapes of die and also to evaluate them by the reached surface quality. Presented approach is verified by machining forging die cavity for production of connecting rod.

Activity-Based Costing System for a Small Manufacturing Company

2011 ◽  
pp. 1-19 ◽  
Author(s):  
Arkadiusz Januszewski
Keyword(s):  
Integrated Circuits ◽  
Production Costs ◽  
Cost Calculation ◽  
Activity Based Costing ◽  
False Information ◽  
Direct Production ◽  
Costing System ◽  
The Right ◽  
The Cost ◽  
Selection Of

The selection of the right cost calculation method is of critical importance when it comes to determining the real product profitability (as well as clients and other calculation objects). Traditional cost calculation methods often provide false information. The literature offers many examples of big companies that have given up traditional methods and applied a new method: activity-based costing (ABC). They discovered that many products that are manufactured generate losses and not profits. Managers, based on incorrect calculations, mistakenly believed in the profitability of each product. Turney (1991) reports on an example of an American manufacturer of over 4,000 different integrated circuits. The cost calculation with the allocation of direct production costs as machinery-hour markup demonstrated a profit margin of over 26% for each product. Implementing ABC showed that the production of more than half of the products was not profitable, and having factored in additional sales and management costs (which accounted for about 40% of the total costs), it was as much as over 75%.

scholarly journals Mathematical modeling in economics for selection of optimum investment solution

2021 ◽  
Vol 273 ◽  
pp. 08003
Author(s):  
Arthur Alukhanyan ◽  
Olga Panfilova
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Linear Programming ◽  
Mathematical Models ◽  
Programming Problem ◽  
Linear Programming Problem ◽  
Target Function ◽  
Investment Portfolio ◽  
Monetary Relations ◽  
Selection Of

This work is devoted to development of economic and mathematical models for selection of the optimum investment solution. Moreover, it states the basis for development of model examples and correction of the model considering the results obtained in the examples. In the work the problem is set for selection of the investment sources and objects, which is limited to the linear programming problem. The controlled variable and basic limitations simulating real credit and monetary relations are distinguished in the provided model. The discounted profit obtained from implementation of the optimum investment portfolio is considered as a target function. The economic and mathematical model presented in the article allows finding the optimum investment solution within the limits of the credit and monetary relations taking place both at the micro- and macroeconomic level.

Facts and myths about antibiotic therapy

2020 ◽  
Vol 13 (3) ◽  
pp. 289-293
Author(s):  
Bartosz J. Sapilak
Keyword(s):  
Antibiotic Therapy ◽  
Viral Infections ◽  
Clinical Problem ◽  
Symptomatic Treatment ◽  
High Dose ◽  
Cost Of Treatment ◽  
The Right ◽  
The Cost ◽  
Regular Intake ◽  
Selection Of

Resistance to antibiotics is becoming a serious clinical problem. It increases the cost of treatment and is the reason for the failure of therapy. It cannot be eliminated, but the principles of prevention must be respected. First, do not prescribe chemotherapeutics in the therapy of viral infections and symptomatic treatment, after the second care to the selection of a sufficiently high dose, recommend regular intake of the drug and do not shorten the time of therapy. It is also important to choose the right active substance, which should be conditioned by the expected sensitivity of bacteria, the localization of inflammation and the age of the patient. Do not forget about the accompanying therapy, including the ordination of the probiotic and antifungal protection.

scholarly journals Basic bases of calculations and optimization of NPP power unit equipment parameters methods of mathematical modelling

2021 ◽  
pp. 29-32
Author(s):  
Olexander Yefimov ◽  
Boris Ilchenko ◽  
Larysa Tiutiunyk ◽  
Tetyana Yesipenko ◽  
Anastasiia Motovilnik ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Models ◽  
Power Unit ◽  
Complex Function ◽  
Optimality Criteria ◽  
Electricity Production ◽  
Hierarchical Level ◽  
Systematic Analysis ◽  
Load Schedule ◽  
Selection Of

The materials of the article consider the optimization of certain parameters and characteristics of the equipment of NPP power units, which are closely related to the processes of their design and construction. Modern NPP power units are complex technical systems. They include a set of interconnected equipment for different technological purposes, which ensures the performance of power units of a complex function of electricity production and heat of the specified quality and according to a given load schedule. Complete mathematical models of the functional state of steam turbine power units are characterized by a large number of nonlinear connections and contain implicit functions. This complicates their widespread use to solve problems of systematic analysis of the quality of operation of power units. The aim of the work is to analyze the basic theoretical foundations, methods and approaches to the calculation and optimization of the parameters of the equipment of NPP power units by methods of mathematical modeling. The solution of the problem of optimization of NPP power unit parameters includes the following stages: selection of optimality criteria (objective functions); development of a system of interconnected mathematical models in accordance with the required hierarchical level of optimization research; selection of computational methods and optimization algorithms. Taking into account the above methodological provisions and approaches increases the efficiency of mathematical modeling to solve problems of calculations and optimization of NPP power unit parameters.

scholarly journals SISTEM PENDUKUNG KEPUTUSAN REKOMENDASI PEMILIHAN SMARTPHONE TERBAIK MENGGUNAKAN METODE TOPSIS

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Anggi Eryzha ◽  
Solikhun Solikhun ◽  
Eka Irawan
Keyword(s):  
Ideal Point ◽  
Lower Class ◽  
Topsis Method ◽  
Multicriteria Method ◽  
Competitive Prices ◽  
Consumptive Behavior ◽  
Point Distance ◽  
The Right ◽  
Selection Of ◽  
The Ideal

Smartphones are a primary need for all upper class and lower class people. As these needs are many smartphone vendors that offer different prices, features, systems and technologies at competitive prices. Many people want specifications that are capable but limited in financial terms. This causes smartphone users not to be able to make the right choice according to their needs because the frequent selection of smartphones is based on prestige and consumer consumptive behavior. The TOPSIS method is a multicriteria method used to identify solutions from alternative sets based on simultaneous minimization of the ideal point distance and maximizing the distance from the lowest point. The expected results can be input to potential smartphone buyers in accordance with their finances and qualified specifications.Keywords: Decision Support System, Topsis Method, Smartphone.

scholarly journals PERANCANGAN MODEL PEMILIHAN SUPPLIER PRODUK CETAKAN DENGAN MENGGUNAKAN GREY BASED TOPSIS (STUDI KASUS: RUMAH SAKIT ISLAM SULTAN AGUNG SEMARANG)

2018 ◽  
Vol 13 (2) ◽  
pp. 99
Author(s):  
Darminto Pujotomo ◽  
Maulana Arif Umaindra ◽  
Purnawan Adi Wicaksono
Keyword(s):  
Decision Maker ◽  
Supplier Selection ◽  
Evaluation Criteria ◽  
Hospital Performance ◽  
Poor Quality ◽  
Work Process ◽  
Itu Model ◽  
The Right ◽  
Selection Of

Abstrak Pemilihan supplier merupakan aktivitas penting dari perusahaan dalam menentukan strategi yang tepat, khususnya pada bagian pengadaan. Rumah Sakit Islam Sultan Agung Semarang (RSIS) merupakan salah satu rumah sakit yang mempunyai masalah dalam melakukan pemilihan supplier produk cetakan. Masalah yang dihadapi yaitu keterlambatan barang, kesalahan mencetak produk, tidak sesuainya kuantitas barang pesan dan kualitas yang buruk yang dikirim oleh beberapa supplier, itu mengakibatkan penurunan kinerja rumah sakit, karena proses kerja akan terganggu. Harga merupakan kriteria utama yang digunakan RSIS dalam memilih supplier produk cetakan. Produk cetakan digunakan untuk menjalankan proses kerja setiap hari di rumah sakit. Tujuan dari penelitian ini adalah untuk merancang model pemilihan dan pengevaluasi supplier multi attribute dengan menggunakan metode Grey (Pemilihan) based TOPSIS (Evaluasi). Kriteria didapatkan berdasarkan wawancara dan studi literatur oleh peneliti dengan para decision maker bagian pengadaan. Terdapat tiga kriteria pemilihan supplier di RSIS dengan menggunakan metode Grey based TOPSIS, yaitu cost, quality dan service. Hasil penelitian mendapatkan supplier terbaik berdasarkan pemilihan para decision maker dengan, urutan supplier terbaik sampai terburuk yaitu supplier D dengan nilai kriteria yang paling baik, kemudian supplier E, A, C hingga supplier terburuk yaitu supplier B. Berdasarkan hasil tersebut dan wawancara didapatkan kemiripan dengan kondisi nyata dari supplier, oleh karena itu model yang dibuat dapat digunakan untuk memilih dan mengevaluasi supplier cetakan di RSIS. AbstractDESIGN OF SUPPLIER MOLD PRODUCTS SELECTION MODEL USING GREY BASED TOPSIS (CASE STUDY: RUMAH SAKIT SULTAN AGUNG SEMARANG). Supplier selection is an important activity of the company in determining the right strategy, especially on the part of procurement. Rumah Sakit Islam Sultan Agung Semarang (RSIS) is one of the hospitals that has problems in choosing a supplier of mold products. Problems encountered are product delays, product print errors, inappropriate quantity of message items and poor quality delivered by some suppliers, resulting in a decrease in hospital performance, as the work process will be disrupted. Price is the main criteria used by RSIS in choosing a supplier of printed products. Mold products are used to run the work process every day at the hospital. The purpose of this research is to design the model of selecting and evaluating the supplier of multi attribute by using the Grey method (Selection) based on TOPSIS (Evaluation). Criteria obtained based on interviews and literature studies by researchers with the decision maker procurement department. There are three criteria of supplier selection in RSIS by using Grey based TOPSIS method, that is cost, quality and service. The result of this research is finding the best supplier based on the selection of the decision maker with the best supplier to the worst that is supplier D with the best criterion value, then supplier E, A, C to the worst supplier that is supplier B. Based on the result and the interview got similarity with the condition real from the supplier, therefore the model can be used to select and evaluate the mold supplier in RSIS.Keywords: Supplier selection; RSIS; Grey; TOPSIS; Mold products

scholarly journals Model Pengambilan Keputusan Pemilihan Bibit Unggul Sapi Bali Menggunakan Metode Weighted Product

2021 ◽  
Vol 8 (5) ◽  
pp. 879
Author(s):  
Dyna Marisa Khairina ◽  
Indra Cahya Pramukti ◽  
Heliza Rahmania Hatta ◽  
Septya Maharani
Keyword(s):  
Decision Making ◽  
Decision Maker ◽  
Efficient Method ◽  
Germ Plasm ◽  
Selection Process ◽  
Product Method ◽  
Bali Cattle ◽  
The Right ◽  
Decision Making Model ◽  
Selection Of

<p class="Abstrak">Kesulitan dalam mencari bibit unggul pada ternak sapi bali, menyebabkan bibit unggul yang terpilih semakin tidak produktif dalam hal penggemukan ternak. Penentuan bibit unggul pada ternak sapi bali merupakan hal yang sangat krusial bagi para pengambil keputusan yang terkait dalam hal ini adalah peternak sapi bali. Jika tidak dilakukan secara tepat dan akurat, maka pemilihan bibit unggul  pada sapi bali yang keliru seringkali mengakibatkan berbagai permasalahan. Model pengambilan keputusan dapat digunakan untuk membantu manusia khususnya peternak sapi dalam mengambil keputusan. Metode <em>Weighted Product</em> adalah metode yang sangat efektif dan efisien dalam pemilihan bibit unggul, karena waktu yang diperlukan untuk perhitungan jauh lebih singkat. Tujuan penelitian ini adalah membuat suatu model pengambilan keputusan untuk pemilihan bibit unggul terbaik pada ternak sapi bali. Adapun model pengambilan keputusan ini membantu memberikan rekomendasi kepada peternak dalam proses pemilihan bibit unggul sapi bali sebagai bahan pertimbangan dalam memilih secara tepat, akurat dan mempermudah proses pemilihan dengan keputusan terbaik.</p><p class="Abstrak"> </p><p class="Abstrak"><em><strong>Abstract</strong></em></p><p class="Abstract"><em>The difficulty to look for superior seeds of Bali cattle causes the selected superior germ plasm being more unproductive in case of fattening cattle. The decision of superior seeds of Bali cattle is a crucial thing for the decision maker, related with this case is Bali cattle breeder. If it is not organized accurately, then the selection of superior seeds on the wrong bali cows often lead to various problems. Decision-making models can be used to help humans, especially cattle ranchers in making decisions. Weighted Product Method is a very effective and efficient method for selecting superior seeds, because the timing needed for calculation is much shorter. The purpose of this research is to make a model of decision making for selection superior seeds of Bali cattle. The decision-making model helps provide recommendations to farmers in the process of selecting superior bali cattle seeds as a material consideration in choosing the right, accurate and simplify the selection process with the best decision.</em></p><p class="Abstrak"><em><strong><br /></strong></em></p>

Understanding the Impact of Brine Hardness on Chemical Enhanced Oil Recovery Surfactants Performance: A Data Journey

2021 ◽  
Author(s):  
Roberto Company ◽  
Sabrina Hocine ◽  
Baptiste Pousset ◽  
Mikel Morvan
Keyword(s):  
Oil Recovery ◽  
Divalent Cations ◽  
Recovery Process ◽  
Injection Process ◽  
Treatment Processes ◽  
Internal Olefin ◽  
The Right ◽  
The Cost ◽  
The Impact ◽  
Selection Of

Abstract Brine composition is one of the key parameters in the design of a surfactant based oil recovery process and is a condition imposed by the reservoir nature. This brine can contain a large variety of ions including monovalent and divalent cations (hardness), which impacts the surfactants solubility. Moreover, hardness evolution during the injection process can also impair surfactant formulations’ performances. Water treatment processes are useful ways to mitigate such risks, but they imply higher CAPEX for the process. As a consequence, the selection of the right surfactant will have a large impact on the cost and on crude oil production. This paper describes solution properties of the most common surfactants used in surfactant flooding i.e. Alkyl Benzene Sulfonates (ABS) and Internal Olefin Sulfonates (IOS) as a function of the brine hardness and will be compared with Internal Ketone Sulfonates (IKS), a new bio-based surfactant family.

A CASE Tool Evaluation and Selection Methodology

2013 ◽  
Vol 4 (2) ◽  
pp. 48-60
Author(s):  
Aniruddha Guha Biswas ◽  
Raveesh Tandon ◽  
Anurika Vaish
Keyword(s):  
Learning Curves ◽  
Advanced Technique ◽  
Case Tools ◽  
Case Tool ◽  
Tool Evaluation ◽  
Score Card ◽  
The Right ◽  
The Cost ◽  
Selection Methodology ◽  
Selection Of

CASE Tools have been considered as the most advanced technique to derive quality products. The cost associated with CASE tools is generally high due to their steep learning curves and is a matter of concern for software engineering houses. This makes it imperative that the right set of CASE tools are evaluated and selected for a particular set of tasks. This research paper proposes a methodology for the purpose of comparison and selection of various CASE tools available in the market. The proposed methodology allows its users to easily identify and select the best CASE tool suited to their purpose. The paper proposes a matrix based model, mapped across parameters and their attributes that produces an optimised score card that supports the decision making process.

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