Wyniki wyszukiwania - BazTech

1

Overview of the concepts of bottleneck in the operation process

Bilinovics-Sipos Judit, Reicher Regina Zsuzsánna

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2023

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z. 170

55--67

EN

Purpose: This paper aims to provide insight into currently available corporate operation and control management approaches through the examined articles, focusing on bottlenecks and closely related theories. Design/methodology/approach: The reviewed publications, which focus on the theory of constraints, different approaches, the concept of bottlenecks, and the presentation of related methods, bring us closer to understanding the changes that have taken place in the past decades. Findings: The immense impact of digitization and changes in demand affect the requests placed on companies; the way consumer needs are met has changed and accelerated, to which companies must adapt. In the case of services and products, the primary goal of manufacturers and service providers is to generate revenue and profit by satisfying consumer needs. For this, creating and maintaining an efficient operating system that does not contain restrictive elements is necessary. This publication provides a comprehensive overview of how the approach to the unified concept of the bottleneck is an effective tool for companies to improve their processes. Research limitations/implications: The current study analyzed some of the most relevant publications in the ScienceDirect database based on the keywords. This approach certainly serves as a beginning point for the understanding that to focus on the researched problem space, a systematic literature review is required. Originality/value: This study provides insight and supports the importance of a unified approach to identifying constraints for effective operational processes.

2

Strategia dalszej eksploatacji i obsługi turbin parowych z uwzględnieniem elastycznych warunków pracy bloku węglowego

Rusin Andrzej, Tomala Martyna

Rynek Energii

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2022

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Nr 6

28--36

PL

Aby zapewnić bezpieczeństwo funkcjonowania systemu elektroenergetycznego w Polsce i utrzymać produkcję energii ze starszych jednostek węglowych, wymagane jest opracowanie strategii dalszej pracy bloków w warunkach zwiększonej elastyczności. W artykule skupiono się na elemencie krytycznym turbiny parowej, jakim jest wirnik części wysokoprężnej. Przedstawiono metodologię pozwalającą na prognozowanie propagacji pęknięć oraz wzrostu zużycia zmęczeniowo-pełzaniowego oraz oszacowano prawdopodobieństwo wystąpienia awarii w kolejnych latach. Rozwój zidentyfikowanych zjawisk jest zależny od poziomu naprężenia podczas rozruchów, który został dobrany w taki sposób aby zapewnić bezpieczeństwo funkcjonowania turbiny w zakładanym okresie 13 lat pracy. Dla dłuższego okresu eksploatacji wynoszącego 20 lat, zaprezentowano dodatkowo metodę doboru optymalnego czasu przeprowadzenia obsługi prewencyjnej w oparciu o analizę ryzyka. Przedstawiono również algorytm pozwalający na monitorowanie poziomu naprężenia w wirniku w trybie online, uwzględniający zmienność współczynnika wnikania ciepła, który następnie może zostać przekształcany w system sterowania poziomem naprężeń w czasie rzeczywistym. Dzięki opracowanym narzędziom możliwe jest uzyskanie żądanego przyrostu naprężenia w czasie rozruchu. Przeprowadzone badania pozwalają na przedstawienie strategii dalszej eksploatacji i obsługi turbiny, która może zostać dopasowana dla konkretnego obiektu rzeczywistego.

EN

In order to ensure the safe operation of the power system in Poland and to maintain energy production from old coal-fired power plants, it is required to develop a strategy for further operation of the units in conditions of increased flexibility. The article focuses on the critical element of the turbine, which is the rotor high-pressure part. The methodology of the forecasting of crack propagation and the increase in fatigue-creep wear was presented, and the probability of failure in the following years was estimated. The development of the identified phenomena depends on the stress level during start-up, therefore it was selected in such a way as to ensure the safety of the turbine's operation during the assumed period of 13 years. For a longer service life of 20 years, the method of selecting the optimal time for preventive maintenance based on a risk analysis was additionally presented. An algorithm for online stress monitoring is also described, taking into account the variability of the heat transfer coefficient. It can be also transformed into a real-time stress level control system. Through the developed tools, it is possible to obtain the desired increase in stresses during start-up. The conducted research allows for the presentation of a strategy for further operation and maintenance of the turbine, which can be adapted to a specific real unit.

3

The concept of operation and production control

Wolniak Radosław

Production Engineering Archives

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2021

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Vol. 27, Iss. 2

100--107

EN

The theoretical aim of the paper is to analyses the main function and concept of production control in operation management. The empirical aim of the paper is to investigate polish production firm opinion about factors affecting production planning and control and also functions of production planning and control. Production control is very important in every factory, and every aspect of operation and production management especially in times of Industry 4.0 conditions. In the paper we presented all classical seven task of production management control. Also there is in the paper an analysis of main factors affecting production control in industrial organization. In the paper we analysed the problems connected with production control. Nowadays in the conditions of Industry 4.0 this is very important concept because the increasing level of digitalization of all industrial processes leads to possibility of detailed analysis of all processes and better level of control. Operation managers should have good level of knowledge about production control and especially quality control. They can use in this many new information tools like statistical methods and artificial intelligence. Especially we think that in the future many function of production control would be assisted by artificial intelligence. We also in the paper give results of research conducted on example of 30 polish production organizations located in Silesia region.

4

Main functions of operation management

Wolniak Radosław

Production Engineering Archives

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2020

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Vol. 26, Iss. 1

11--14

EN

Presented paper concentrate on problems connected with the function of operation management within the company. Operation function is responsible for producing products and delivering services. But it needs support and input from others areas of the organization. The aim of the paper it to analyze on the basis on inter-national the main functions of operation management. We can distinguish seven main functions of operation management in the industrial enterprise: planning, scheduling, purchasing, controlling, quality control and inventory control. In each of those fields operations managers should conduct many decision affecting of-organization effectiveness.

5

Website development process improvement in SMEs using TPS with the implementation of Lean and Agile methodologies - an empirical study

Joshi Kavan, Siemieniak Maciej

Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie

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2019

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Nr 80

133--148

EN

The main aim of the article is to improve the website development process by using the Agile Development Toolkit: Lean Software Development which is developed from the combination of Lean and Agile principles and the theory of waste elimination from the Toyota Production System. This article explains the definitions of the kinds of wastes that are generated during the website development process within an IT Company and generally in SMEs in India and by taking preventive steps, improving the process by eliminating generated waste. The main aim of the research is to use Lean Software Development, a toolkit of Agile Development, that can be implemented within IT SMEs to overcome wastes. This article focuses on finding root causes of problems within the website development process and applying principles of Lean Software Development to remove those problems and accelerate the website development process. Another analysis was performed to show which principles of Lean Development and Agile Development can be correlated if a website/software is developed using any of these two development methodologies, and not specifically Lean Software Development.

PL

Głównym celem artykułu jest usprawnienie procesu tworzenia stron internetowych za pomocą zestawu narzędzi programistycznych Agile: Lean Software Development, który został opracowany przez Toyota Production System na podstawie powiązań Lean i Agile oraz teorii eliminacji strat. Wyjaśniono w nim definicje rodzajów strat generowanych w procesie tworzenia strony internetowej w firmie informatycznej i ogólnie w małych i średnich przedsiębiorstwach w Indiach, jak również podjęto kroki zapobiegawcze, ulepszając proces i eliminując straty. Głównym celem badań jest wykorzystanie Lean Software Development - zestawu narzędzi Agile Development, które można wdrożyć w małych i średnich przedsiębiorstwach IT w celu wyeliminowania strat. W artykule przedstawiono sposób usunięcia omawianych problemów i przyspieszenia procesu tworzenia strony internetowej przez wykrycie przyczyn tych problemów i z zastosowaniem zasady Lean Software Development. Kolejną analizę przeprowadzono, aby wskazać, które zasady Lean Development i Agile Development mogą być skorelowane, jeśli strona internetowa / oprogramowanie są rozwijane z użyciem którejkolwiek z tych dwóch metod.

6

Operation manager and its role in the enterprise

Wolniak Radosław

Production Engineering Archives

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2019

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Vol. 24

1--4

EN

Presented paper concentrate on problems connected with the role of operation manager within industrial company. Operation management concentrate many activities in today’s industrial corporation and because of that the role of it’s manager is very important. He should to have many skills described in this paper. We analysed responsibilities of the operation manager, his basic operational skills and also give some examples of duties and responsibilities of good operation manager on the example of food industry. This example can give some remarks about practical skills needed in operation management in particular enterprise.

7

Operatywne zarządzanie miejskim transportem publicznym na przykładzie MZA Warszawa

Suda J.

Transport Miejski i Regionalny

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2017

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nr 12

21--26

PL

Artykuł prezentuje doświadczenia z budowy, wdrażania i eksploatacji operatorskiego systemu zarządczego umożliwiającego operatywne zarządzanie miejskim transportem publicznym. Skonstruowany i uruchomiony w Miejskich Zakładach Autobusowych w Warszawie system obejmuje około 1500 pojazdów. Są to autobusy, radiowozy i pojazdy techniczne. W artykule przedstawiono klasyfikacje systemów zarządzania transportem publicznym i ponad 30-letnie doświadczenie z ich budowy w Warszawie. Obecnie eksploatowana jest trzecia generacja systemów. Prezentowane rozwiązanie to szereg aplikacji funkcjonalnych wykonywanych przez różne firmy według założeń, wymagań i projektów sformułowanych przez zespół pracowników Politechniki Warszawskiej i Miejskich Zakładów Autobusowych w Warszawie.

EN

The article presents experiences in the designing, implementation and operation of an operative management system for public urban transport which covers approximately 1500 vehicles (buses, coaches and technical vehicles) of the Warsaw Municipal Bus Company (MZA Warszawa). In the article classifications of public transport management systems as well as over 30 years of the history and experience in their construction in Warsaw was presented. Currently its third generation is been operating. The system includes number of functional applications performed by various engineering and IT companies according to the requirements and projects formulated by the Municipal Bus Company and Warsaw University of Technology.

8

A method for determining the usability potential of ship steam boilers

Muślewski Ł., Pająk M., Landowski B., Żółtowski B.

Polish Maritime Research

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2016

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nr 4

105--111

EN

Ship large-power steam boiler may serve as an example of complex critical technical system. A basis for rational control of operation of such system is knowledge on its capability of fulfilling the tasks to which it was intended. In order to make it possible to apply computer aiding to operational decision-making the capability should be described analytically. In this paper it was proposed to express the capability of ship steam boiler ( considered a complex system) to perform service tasks, by calculating components of its usability potential in a given instant t. To this end , was distinguished a set of steam boiler fundamental features which formulate space of its technical states. Values and characteristic intervals of the features were defined and this way sub-spaces of serviceability and non-serviceability states of the object in question were determined. Next, in the considered space, technical state of the boiler and its usability potential was determined. Owing to this it become possible to quantitatively express the steam boiler functioning capability which served as a basis for elaborating an algorithm for controlling the operational processes of a complex technical system under action. In this paper is also described a way of application of the presented method to calculation of ship steam boiler usability potential, which may be especially instrumental in the case of operational control of the boilers of the kind , equipped with interstage reheaters, i.e. those operating with high values of operational parameters.

9

Applicability of Business Rules to Production Management in Foundries

Stawowy A., Duda J., Wrona R.

Archives of Foundry Engineering

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2016

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Vol. 16, iss. 1

85--88

EN

The size and complexity of decision problems in production systems and their impact on the economic results of companies make it necessary to develop new methods of solving these problems. One of the latest methods of decision support is business rules management. This approach can be used for the quantitative and qualitative decision, among them to production management. Our study has shown that the concept of business rules BR can play at most a supporting role in manufacturing management, but alone cannot form a complete solution for production management in foundries.

10

Required buffer capacities in assembly systems

Krenczyk D., Dobrzańska-Danikiewicz A.

Journal of Achievements in Materials and Manufacturing Engineering

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2007

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Vol. 23, nr 1

95-98

EN

Purpose: The aim of the realised analysis is the determination of the set of conditions. The fulfilment of those conditions enables the synchronisation of the assembly system work into the steady state. It is necessary to specify the rules controlling the assembly system work. Rhythmic concurrent production with wide assortment in the considered assembly system is realised. Design/methodology/approach: The theoretical roots of the considerations presented in that paper include theory of constraints. The presented approach is consistent with the authority method called Requirements and Possibilities Balance Method (RPBM). Findings: Two kinds of system buffers: the entrance buffers and the inter-resources buffers are considered in that paper. The number of buffers elements needed for production during first steady state of the given system has been determined. Mathematical formulas specifying the minimal capacity of the buffers allocated in the assembly system have been outworked. Research limitations/implications: The formulas specifying the minimal buffer capacity constitute the first step towards formulation of the automatic method. That method is designed for the automatic construction of rules controlling the system work during transient phases between two different steady states. The process enables automation of the introduction filling of the system buffers. Practical implications: The presented formulas can become an integrated part of existing authority software. The developed computer system aids the decision-making process connected with production planning and ensures effective utilisation of production resources. Moreover, the formulas correctness during computer simulations has been verified. Originality/value: To develop the formulas specifying the minimal capacity of the system buffers is the main achievement of the given paper. The presented approach permits to solve the problem concerning the synchronisation of the assembly system work into the steady state.

11

BSC methodology for determining strategy of manufacturing enterprises of SME sector

Torbacka M., Torbacki W.

Journal of Achievements in Materials and Manufacturing Engineering

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2007

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Vol. 23, nr 2

99-102

EN

Purpose: The main issue of this paper is to present a modern way of determining business strategy with a use of Balanced Scorecard methodology (BSC) integrated with ERP/MRP rank systems for managing manufacturing companies. Design/methodology /approach: The paper presents assumptions, aims and ways of implementation of Balanced Scorecard on a background of classic manufacturing company management. Findings: A present state of software development produced for strategic company management as well as proposals of ways and directions of its development for SME sector was introduced in this paper. Research limitations/implications: Further researches should be concentrated on particularising of so-called scorecard of manufacturing company. Practical implications: The paper presents an example of a needs analyse which is necessary to be performed during a process of choosing one of ERP/MRP rank computer system for manufacturing company service. Originality/value: The paper might be useful for person dealing with modern techniques of manufacturing company management.