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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Integrace organizace procesním řízením / The integration of an organization by the process management

Křivanec, Oto January 2013 (has links)
This thesis describes the integration of an organization by the process management and it is based on a hypothesis: Is it possible by using process audit to assess the maturity level of the process(es) and the maturity of the organization Mepatek holding itself? The thesis has following objectives: Firstly the research of theoretical basis for the application of appropriate methodologies for a designing process-driven organization, secondly with the help of the process audit assess the maturity process(es) and the entire organization and thirdly a proposal of process-driven organization. This thesis is divided in four parts. The first part is connected to the explanation of the topic, hypotheses definition and objectives. The second part concerns on process management which defines the basic concepts and describes the theoretical background needed to understand the issue. The third part deals with the integration of an organization Mepatek holding"by the process management. The fourth and last part contains a conclusion and evaluation of the objectives of the thesis.
32

Studie rozvoje systému ve firmě Dussmann spol. s r.o. se zaměřením na procesní analýzu a využití ICT / Study of system development in firm Dussmann spol. s r.o. focused on process analysis and ICT use

Petřek, Pavel January 2012 (has links)
In theoretical part, this thesis deals with evolution of term information which must be interpreted right way to continue to larger, more complex systems like information systems. This technical part is supported by proces analysis, which is needed to identify main processes of the organisation. This core proceses can be now supported by ICT in order to improve their efectiveness and performance. Increased quality of these processes is measured by applying maturity model, that can quantify diferencies between new processes and original ones.
33

Procesní analýza studentské organizace AIESEC Praha / Process analysis of student organisation AIESEC Praha

Krotký, Vojtěch January 2014 (has links)
This thesis is focused on solving specific problems in NGO organization AIESEC Praha, caused by big fluctuation, by process analysis and process management implementation. The aim of this paper is provide theoretical introduction to process management and its associated areas. In the beginning of practical part organization is introduced, also with its culture and legal environment that affects its main processes. Following strategic analysis is base for identification of single processes in the organization. Process analysis itself takes major part of thesis and involves described several driving processes through the organization. At the end the knowledge database Tiki is introduced with final conclusions and evaluation.
34

DIMENSIONALITY REDUCTION FOR DATA DRIVEN PROCESS MODELING

DWIVEDI, SAURABH January 2003 (has links)
No description available.
35

Automation of the data analysis system used in process modeling applications

Gopinath, Srivats January 1986 (has links)
No description available.
36

In-mold coating of thermoplastic and composite parts: microfluidics and rheology

Aramphongphun, Chuckaphun 13 March 2006 (has links)
No description available.
37

Investigating the Process-Structure-Property Relationships in Vat Photopolymerization to Enable Fabrication of Performance Polymers

Meenakshisundaram, Viswanath 07 January 2021 (has links)
Vat photopolymerization's (VP) use in large-scale industrial manufacturing is limited due to poor scalability, and limited catalogue of engineering polymers. The challenges in scalability stem from an inherent process paradox: the feature resolution, part size, and manufacturing throughput cannot be maximized simultaneously in standard VP platforms. In addition, VP's inability to process viscous and high-molecular weight engineering polymers limits the VP materials catalogue. To address these limitations, the research presented in this work was conducted in two stages: (1) Development and modeling of new VP platforms to address the scalability and viscosity challenges, and (2) Investigating the influence of using the new processes on the cured polymer network structure and mechanical properties. First, a scanning mask projection vat photopolymerization (S-MPVP) system was developed to address the scalability limitations in VP systems. The process paradox was resolved by scanning the mask projection device across the resin surface while simultaneously projecting the layer as a movie. Using actual projected pixel irradiance distribution, a process model was developed to capture the interaction between projected pixels and the resin, and predict the resulting cure profile with an error of 2.9%. The S-MPVP model was then extended for processing heterogeneous UV scattering resins (i.e. UV curable polymer colloids). Using computer vision, the scattering of incident UV radiation on the resin surface was successfully captured and used to predict scattering-compensated printing parameters (bitmap pattern, exposure time , scanning speed). The developed reverse-curing model was used to successfully fabricate complex features using photocurable SBR latex with XY errors < 1.3%. To address the low manufacturing throughput of VP systems, a recoat-less, volumetric curing VP system that fabricates parts by continuously irradiating the resin surface with a movie composed of different gray-scaled bitmap images ( Free-surface movie mask projection (FreeMMaP)) was developed. The effect of cumulative exposure on the cure profile (X,Y,Z dimensions) was investigated and used to develop an iterative gray-scaling algorithm that generated a combination of gray-scaled bitmap images and exposure times that result in accurate volumetric curing (errors in XY plane and Z axis < 5% and 3% respectively). Results of this work demonstrate that the elimination of the recoating process increased manufacturing speed by 8.05 times and enabled high-resolution fabrication with highly viscous resins or soft gels. Then, highly viscous resins were made processible in VP systems by using elevated processing temperatures to lower resin viscosity. New characterization techniques were developed to determine the threshold printing temperature and time that prevented the onset of thermally-induced polymerization. The effect of printing temperature on curing, cured polymer structure, cured polymer mechanical properties, and printable aspect ratio was also investigated using diacrylate and dimethacrylate resins. Results of this investigation revealed increasing printing temperature resulted in improvements in crosslink density, tensile strength, and printability. However, presence of hydroxl groups on the resin backbone caused deterioration of crosslink density, mechanical properties, and curing properties at elevated printing temperatures. Finally, the lack of a systematic, constraint based approach to resin design was bridged by using the results of earlier process-structure-property explorations to create an intuitive framework for resin screening and design. Key screening parameters (such as UV absorptivity, plateau storage modulus) and design parameters (such as photoinitiator concentration, polymer concentration, UV blocker concentration) were identified and the methods to optimize them to meet the desired printability metrics were demonstrated using case studies. Most work in vat photopolymerization either deal with materials development or process development and modeling. This dissertation is placed at the intersection of process development and materials development, thus giving it an unique perspective for exploring the inter-dependency of machine and material. The process models, machines and techniques used in this work to make a material printable will serve as a guide for chemists and engineers working on the next generation of vat photopolymerization machines and materials. / Doctor of Philosophy / Vat Photopolymerization (VP) is a polymer-based additive manufacturing platform that uses UV light to cure a photo-sensitive polymer into the desired shape. While parts fabricated via VP exhibit excellent surface finish and high-feature resolution, their use for commercial manufacturing is limited because of its poor scalability for large-scale manufacturing and limited selection of engineering materials. This work focuses on the development of new VP platforms, process models and the investigation of the process-structure-property relationships to mitigate these limitations and enable fabrication of performance polymers. The first section of the dissertation presents the development of two new VP platforms to address the limitations in scalability. The Scanning Mask Projection Vat Photopolymerization (S-MPVP)) was developed to fabricate large area parts with high-resolution features and the Free-surface movie mask projection (FreeMMaP) VP platform was developed to enable high-speed, recoat-less, volumetric fabrication of 3D objects. Computer-vision based models were developed to investigate the influence of these new processes on the resultant cure shape and dimensional accuracy. Process models that can: (1) predict the cure profile for given input printing parameters (error < 3%), (2) predict the printing parameters (exposure time, bitmap gray-scaling) required for accurate part fabrication in homogeneous and UV scattering resins, and (3) generate gray-scaled bitmap images that can induce volumetric curing inside the resin (dimensional accuracy of 97% Z axis, 95% XY axis), were designed and demonstrated successfully. In the second portion of this work, the use of high-temperature VP to enable processing of high-viscosity resins and expansion of materials catalogue is presented. New methods to characterize the resin's thermal stability are developed. Techniques to determine the printing temperature and time that will prevent the occurrence of thermally-induced polymerization are demonstrated. Parts were fabricated at different printing temperatures and the influence of printing temperature on the resultant mechanical properties and polymer network structure was studied. Results of this work indicate that elevated printing temperature can be used to alter the final mechanical properties of the printed part and improve the printability of the high-resolution, slender features. Finally, the results of the process-structure-property investigations conducted in this work were used to guide the development of a resin design framework that highlights the parameters, metrics, and methods required to (1) identify printable resin formulations, and (2) tune printable formulations for optimal photocuring. Elements of this framework were then combined into an intuitive flowchart to serve as a design tool for chemists and engineers.
38

Business Process Modeling: Process Events and States / Modelování business procesů: události a stavy procesu

Svatoš, Oleg January 2005 (has links)
This thesis focuses on modeling of business processes which are very sensitive on correct capturing of process details characterized as process events and states. At the beginning of the analysis are the process events and states classified into three types: activity related, object related and time related. Each type is analyzed in detail and there are formulated states and their transitions that form a lifecycle of each individual type of the process state. There are discussed contemporary process modeling languages starting from the very popular to relatively less known, all representing slightly different approach towards process modeling. The analysis of process events and states shows that the contemporary process modeling languages cover the defined lifecycles only partially. There are picked three popular process modeling languages and put through a test case, which is based on Czech regulation of a building process. This test case allows us to review their capabilities to capture the process events including the ways how they get along with their only partial support. Upon analysis of process events and states and the unsatisfying results of the con-temporary process modeling languages in the test case, there is introduced a new process modeling language which, as demonstrated, is capable of capturing many of the process events and states in the test case in much simpler and precise way that the three reviewed process modeling languages were able to.
39

Standardy modelování a řízení podnikových procesů / Business Process Modeling Standards

Klička, Lukáš January 2010 (has links)
Business process modeling plays an important role for the documentation and analysis of organizational processes and for the specification of requirements for information systems. Currently, there are many standards for process modeling, and each represents a different approach to modeling and provides different opportunities for creating models. Thus, same models created in different modeling languages differ in terms of their expressiveness, according to each standard. The goal of this thesis is to evaluate the effectiveness of selected business process modeling standards. The effectiveness of standards will be evaluated on two levels. First, in terms of their semantics and second, in terms of their syntax. Evaluation of standards in terms of their semantics will be based on the comparison of standards with a business process metamodel created within the project Opensoul. This model defines a set of basic elements and their associations at a basic level of process modeling. Evaluation of standards in terms of their syntax will be based on the comparison of standards with a framework proposed by Moody and Hillegersberg. The results of this comparison should show which standard best supports defined criteria. The evaluation framework will be applied on the following process modeling standards: BPMN, EPC and IDEF3. Based on the results obtained their strength and weaknesses will be discussed. The main contribution of this thesis can be seen both in the analysis of the element set of selected process modeling standards and further in the comparison of standards according to the evaluation framework.
40

Hodnocení nástrojů pro procesní modelování / Evaluation of tools for process modeling

Engeová, Andrea January 2017 (has links)
This diploma thesis deals with the modeling and evaluation tools that are used for process modeling. The aim is to provide a method of selecting the most appropriate tool for selected requirements. This goal is achieved by using several subgoals, which include tools analysis for process modeling, design criteria for the selection of tools, their weights calculation, design and construction method for selecting tools in Excel and create case studies that will demonstrate the principles of selection tools. At the beginning of the thesis is characterized by the area of process management, its history, actual trends and definitions related thereto. Another chapter is a description of notations that are used for modeling processes. The largest part of the chapter is devoted to the characteristics Notation Business Process Model and Notation (BPMN), which together with their graphic design described all the elements of notation. The remaining part of the chapter describes the notation event-driven process chain (EPC) and the Unified Modeling Language (UML). A description of tools for process modeling is dedicated to the fifth chapter includes a detailed characterization of each instrument. Based on the individual tools and literary sources, the next chapter in the proposed criteria by which the tools will be evaluated. For calculating the weights of the proposed criteria is used Fuller method. The chapter concludes with evaluation tools previously described and a description of how to select the creation tools in Excel. The work ends with case studies which serve to illustrate the procedure for selecting tools.

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