The objective of this study aims at using the Matlab-Simulink environment and the LabVIEW software environment to build computer models of a six-dimensional (6D) chaotic dynamic system. For the fixed system’s parameters, the spectrum of Lyapunov exponents and the Kaplan-York dimension are calculated. The presence of two positive Lyapunov exponents demonstrates the hyperchaotic behavior of the system. The fractional Kaplan-York dimension indicates the fractal structure of strange attractors. An active control method is extended to achieve global chaotic synchronization of two identical novel 6D chaotic systems with unknown system parameters. Based on the results obtained in Matlab-Simulink and LabVIEW models, a chaotic signal generator for the 6D chaotic system is implemented in the MultiSim environment. The experimental results show that the chaotic behavior simulation in the MultiSim environment is similar to those in the Matlab-Simulink and LabVIEW models. The simulation results demonstrate that the Pecora-Carroll method is a simple way of chaotic masking and signal decoding.

Context. A relevant problem of an approach development used to reduce system or random errors which occur during business process models design is solved. The object of the research includes graphical and mathematical models which describe business process structure. Objective. Minimization of systematic or random errors based on the development of an approach to formation and analysis of a business process structure in IDEF0 notation. Method. The approach to formation and analysis of a business processes structure in IDEF0 notation is proposed. Balancing coefficient, which was modified and augmented, considering weight coefficients of arcs of various types, is used for IDEF0 diagrams analysis. Cohesion types defined in the ISO/IEC/IEEE 2476 standard, which weight coefficients are calculated using their values normalization, are used to define values of arc weight coefficients. Results. The approach to IDEF0 diagrams analysis, which allows defining structural changes of diagrams to satisfy balancing requirements, has been developed. Recommendations obtained as a result of IDEF0 diagrams analysis, which describe product purchase and software release processes, and also recommendations of DevOps concept and SCOR supply chain reference model have been used to transform the source diagrams according to the balancing requirements. Further research may consider using of expert judgments for making decisions on recommendations development. Conclusions. The proposed approach can be used to support activities of collecting, storing, and sharing organizational knowledge allowing to analyze and improve business process models before they are added into an enterprise repository for future reuse to design new solutions. Next studies will consider various approaches to business process models representation in an enterprise repository, corresponding to Archimate, ARIS, and other notations.

No abstract

No abstract

Business process modeling is one of the main tools of the BPM (Business Process Management) concept. With the help of business process modeling, business scenarios can be presented in the form of graphical models that can be easily understood by both information technology (IT) professionals and non-IT professionals – business analysts, software customers, department heads, top managers, and other stakeholders interested in business process improvement. Business process improvement is usually done through the automation of activities, which were identified as “bottlenecks” after analysis. However, it is possible to analyze a business process model only if it is clear and correct in terms of compliance with both the notation used and the real business process it depicts. This paper considers the analysis of BPMN (Business Process Model and Notation) business process model structural measures. It is assumed that business process models, which by their structural features violate rules of business process modeling, are neither understandable nor suitable for further work with them, which also can lead to various errors occurring at the stage of business process analysis, as well as at the stage of its improvement and implementation of proposed changes, i.e., during development, testing and maintenance of distinct software components, information system modules or BPM-system scenarios that ensure business process execution. Therefore, in this paper, we propose to identify the main elements of BPMN business process models and their structural measures that affect models’ understandability and maintainability and could be sources of errors. Considering selected measures, it is proposed to calculate respective values for a large collection of BPMN business process models, and then study compliance with theoretical business process modeling guidelines on practice when real business process models are designed. In order to provide efficient storage and processing of a large collection of BPMN business process models data, there were developed a database, and a software component. Results of analysis of BPMN business process model structural measures obtained using developed database and software component are demonstrated and discussed. The conclusion is made, as well as future research directions in this field are formulated.