Construction of Management Information Systems of Distributed Business Processes Based on Petri Networks and Object-Role Modeling

Transcription

1 saqartvelos mecnierebata erovnli akademiis moambe, t 8, #1, 2014 BULLETIN OF THE GEORGIAN NATIONAL ACADEMY OF SCIENCES, vol 8, no 1, 2014 Informatics Constrction of Management Information Systems of Distribted Bsiness Processes Based on Petri Networks and Object-Role Modeling Giorgi Gogichaishvili *, Gia Srgladze **, Nino Topria **, Beka Urshadze ** * Academy Member, Georgian Technical University, Tbilisi ** Faclty of Informatics and Control Systems, Georgian Technical University, Tbilisi ABSTRACT The model of the service organs optimm nmber of client-server architectre based on Markovian processes and algorithmic schemes of its soltion are worked ot On the grond of certain facts the Object Role Model (ORM) is created The concept of the distribted databases creation for varios financial strctres based on Service-Oriented Architectre is offered The forms of webapplication on Ms Visal StdioNET platform by NORMA software and Ms SQL Server package are realized The isses of modeling for bsiness processes of corporate systems, atomatization of designing the database strctres and the consmers interfaces are considered 2014 Bll Georg Natl Acad Sci Key words: management information systems, distribted bsiness processes, Markovian processes, BPMN, Petri Networks, Object Role Model The task of integration of corporate information systems is especially relevant today It reqires reengineering of the existing systems and addressing the ser-friendly connection of new systems with the existing ones At this stage, most important is the time factor of pgrading the system, and the se of CASE technology for redcing time plays important role in this respect For creation of a nified corporate information system software based on distribted bsiness processes, the proper implementation of software systems life cycle management is needed, which will significantly improve their qality [1] The design of distribted systems of electronic bsiness and commerce control reqires soltion of the problems of informational spport, software and hardware of separate fnctional nits based on new network information technologies [2,3] System operation conditions shold satisfy the following demands: the system shold fnction with the se of internet-intranet networks; the system shold provide information secrity and protection; the system shold have a ser-friendly interface;

2 Constrction of Management Information Systems 59 the service shold be simple Compter network system of commercial objects control is oriented to operate in mlti-ser mode that reqires the garantee of system fnctioning safety Network base systems of data have special password systems for sers registration (Login ID) and operation [4,5] Bsiness Process Modeling with BPMN Tool The problems of inter-corporate bsiness process management are considered in the paper The qestions of bsiness processes integration, information composition and synchronization related to mlti-application environment are discssed Considering the inter and intra-corporate management aspects, main attention is given to the strategies of software prodct development in the organizational systems [6] To provide the integration of the horizontal and vertical management in the inter-corporate applications, the possibilities of service-oriented architectre and its practical realization examples are described Consider the bsiness process model between the Tax Service of the Ministry of Finance and the Banks, the formation of the incapslated bsiness fnctions in the web-services and the inter-corporate application process Encashment process in a bank starts at a pre-determined time Windows service in the database tables views the lists of encashments to be processed and calls the GetActiveOrder; received encashment lists are transmitted to the ReqestAmontFromMof, which forms XML messages and calls Revene Service s webservice Revene Service retrns XML messages to the bank s web-service, which incldes encashment nmbers and the corresponding amonts, this information is recorded in the database Bank employee views encashment list sing a program, then the web-service Get is called and verified; database procedres are invoked to perform transactions, transfer amonts from the accont to the Revene Service accont If the amont is flly paid, the stats will change to active and the employee will nlock the card, etc [6] The Corporate Network and Information Secrity Information protection reqires soltion of two problems: provision of data continity and garantee of secrecy (installation of limitations for data receiving) In order to provide database continity the strctral limitations and data vale limitations are directly sed Limitations on strctral level are based on the description of fnctional dependences (relations, attribtes, etc) in data bases The special notions of key attribtes, indexes (simple or composite) are introdced They realize information ordering, retrieval and selection in relational files The continity limitations on data vale variation is realized with triggers These are activation fnctions providing data continity in logically connected tables (relations) Initiation of standard or private fnctions in the system is determined by the ser, while the triggers do not depend on the program It is keyed-on every time whenever the information is renewed in the data base One of their fnctions is to report the data change statistics in the system Stdy of bsiness processes in a statistical mode on the basis of the theory of qees for investigation of the proposed scheme the mass service model for steady-state regime has been sed (M/M/m, M - Markov property, Poisson/Exponential distribtion; m - nmber of servers) Consider the corporate network model, where there are several sers and several servers (service) with services Sppose, that one of the servers performs a distribtion fnction, ie, receives a reqest from a ser and sends it to the server (which is available) If all the servers are bsy, the reqest is qeed waiting ntil one of them is available As soon as server (Ni, i=1,6) receives reqest from the distribtion server (Nmain), it serves with some specific services and retrns the reslts back to the distribtion server, which in its trn sends the response to the ser Or goal is to identify the critical point of network fnctioning with the help of the existing param-

3 60 Giorgi Gogichaishvili, Gia Srgladze, Nino Topria Tab1 Wait-positions in the range Fig 1 Reslts of simlation processes-2 Fig1 Reslts of simlation processes-2 eters to choose the characteristics which ensre its normal fnctioning creating software prodct, which performs all of the above-mentioned According to the theory of mass service the above-mentioned system is of M/M/m type [6] The Erlang fnction plays an important role in the research of M/M/m type systems This fnction defines the probability of all the servers being bsy, and at the same time, it defines the probability of waiting for the reqest arrivalwe are going to se the following eqation for the Erlang fnction: m m m1 m Ec m, / m! / / m! 1 / m!, k 0 where and are network characteristics, in particlar, arrival rate = * Ts and load of server = / m The average time of reqest waiting is very important for a ser and is derived from the following expression: T w Ec m, Ts m 1 It is necessary to determine the average time of a reqest being within the system: Tq Tw Ts The probability that the time reqest spends within the system is less than t depends on whether = m-1 or not If this condition is met, the following expression is obtained: otherwise: t t Ts P 1 1 Ec m, e, Ts t t,, m c T T B E m Ec m p e e B B s s 1, where B = m-1- At each point of time there will be a certain qantity of reqests within the network The less the reqests, the better the network fnctions The probability that there are k qantity of reqests in the network is p k, where when k <= m and p k p k P k! k m! m 0, k m P 0 is the probability that there are no reqests in the network We have discssed probabilities so far The qantity of reqests present within the system is Lq, where P 0 pec m, Lq 1 If there are m or less than m qantity of reqests,

4 Constrction of Management Information Systems 61 Fig 2 ORM Diagram then the qantity of reqests being in qee eqals 0, and if we know that the reqest x is in the qee, then there will be x+m reqests in the whole system, Ths, we have the following characteristics: Probability of reqests being in qee: p m pk k 0 Probability of x reqest being in qee: p, where x > m px m Average nmber of reqests being in qee: L w pe c m, 1 The software developed by s ses the above qantities and eqations to analyze network parametres and to find optimal vales for them The object-oriented visal program modles have been developed For compter network a class (new type) has been developed, the closed parameters of which are: reqest arrival freqency, service time, nmber of servers, etc, while class methods absoltely present the steady-state regime of network operation and provides estimation of optimm vales of its parameters The stdy of bsiness processes in dynamic mode with Petri nets The problems of modeling and the reqests processing in banking corporations are stdied based on service applications and systems analysis The concept of bilding an integrated atomated UML-based standards and service-oriented architectre is introdced It is proposed to se colored Petri nets (CPN) [7,8] to constrct a simlation model of inter-corporate service processes and stdy the temporal characteristics of its fnctioning

5 62 Giorgi Gogichaishvili, Gia Srgladze, Nino Topria Based on the analysis of Petri nets when the parameters change the delay time (Wait - position) in the range [0-300], obtained reslts are shown in Table 1 and Fig 1 Designing database with Object-Role Model Object-Role Modeling (ORM) problem for intercorporate atomated systems and its implementation is considered in the article The concept of the distribted database creation for varios financial strctres on the basis of service-oriented architectre is offered (Fig 2) The web-application forms on Ms Visal Stdio NET platform by the NORMA software [9,10] and Ms SQL Server package are realized as a reslt [5] ORM is a method for designing and qerying database models at the conceptal level, where the application is described in terms readily nderstood by sers rather than being recast in terms of implementation data strctres It views the application world as a set of objects that plays roles Sometimes it is called fact-based modeling becase ORM verbalizes the relevant data as elementary facts [see 11] It may represent nity elementary facts: f1 - Client has Name; f2 - Client has Accont; f3 - Client has Type; f4 Accont has Accont #; f5 Accont has Crrency; f6- Client has Incasso; f7-incaso has Incasso Stats; f8- Accont has Accont t Stats; f9- Accont has Branch; f10- Client has Stats Conclsion Dring the systems designing, the joint work of the bsiness analysts and systems (software) will be reqired to precisely determine the major reqirements for realization systems From this point of view, application of ORM and BPMN models, being crrently considered as the agreed standard for all stakeholders of the bsiness sphere significantly facilitates the elaboration of the problem detection phase ths giving the possibility to create the primary carcass of the atomation system [12] However, the ORM instrment describes the system on the data strctre level only and does not provide the determination of the process strctres and scenario-relevant system behavior To describe the workflow and bsiness process lifestyle the BPMN model is applied Bsiness Process Modeling Notation secres the opportnity of synchronization of the bsiness model and informational model ths being considered as De Facto standard for description of the web-service based on bsiness processes The priority is given to the visal side of modeling the graphic elements and compatibility of the diagrams

6 Constrction of Management Information Systems 63 informatika ganawilebli biznes-procesebis martvis sainformacio sistemebis ageba petris qselebis da obieqt-rolri modelirebis safzvelze g gogicaisvili *, g srglaze **, n Tofria **, b rsaze ** * akademiis wevri, saqartvelos teqnikri niversiteti, informatikisa da martvis sistemebis faklteti, Tbilisi ** saqartvelos teqnikri niversiteti, informatikisa da martvis sistemebis faklteti, Tbilisi ganixileba martvis sainformacio sistemebis daproeqtebisa da programirebis sakitxebi, mati proces-orientirebli da obieqt-orientirebli modelirebis, analizis da realizaciisatvis masobrivi momsaxrebis modelebis safzvelze Catareblia komercili martvis sistemis qselis agebis macveneblebis analizi markovli procesebis gamoyenebit ganisazrvreba klient-serverli arqiteqtris strqtra da SemoTavazeblia algoritmli sqemebis realizacia mat gadasawyvetad ganixileba obieqt-rolri modelirebis problema interkorporacili avtomatizebli sistemistvis da SemSaveblia misi ganxorcielebis gza warmodgenilia sxvadasxva finansri strqtrebis ganawilebli monacemta bazebis Seqmnis koncefcia servis-orientirebli arqiteqtris safzvelze Sedegad SemoTavazeblia Web-aplikaciis formebi Ms Visal StdioNET platformaze NORMA programli paketis da MsSQLServer monacemta bazebis martvis sistemis safzvelze gansaktrebit gamaxvileblia yradreba korporacili sistemebis biznes procesebis avtomatizebli daproeqtebis, monacemta bazis strqtrebis da momxmarebelta interfeisebis SemSavebis ertiani metodologiis Camoyalibebaze CASE teqnologiebit

7 64 Giorgi Gogichaishvili, Gia Srgladze, Nino Topria REFERENCES: 1 GO Langford (2012), Engineering Systems Integration: Theory, Metriccs, and Methods CRC Press 406 p 2 K Watson, Ch Nagel, JH Pedersen, et al (2008), Visal C# 2008 ISBN Wiley Pblishing, Inc, Indianapolis, Indiana, 1211 p 3 S Robinson, O Cornes, J Glinn, et al (2001), Professional C#, v1,2 Wrox Press, Birmingham, 1002 p 4 G Srgladze, E Trkia, N Topria (2012), Procof the 5 th Intern Conf Problems of Cybernetics and Informatics (PCI 2012), Bak,Azerbaijan: G Srgladze, O Shonia, L Kvavadze (2004), Distribted database management systems (Ms Access, SQL_Server, InterBase, JDBC, Oracle) ISBN , GTU, Tbilisi, 230 p (in Georgian) 6 G Srgladze, I Blia (2012), Integration and Bilding of Web-Applications for Entererpises ISBN GTU, Tbilisi, 334 p (in Georgian) 7 G Srgladze, E Trkia, D Gla (2008), Proc of InternConf Edcation, science and economics at niversities Integration to international edcation area, Poland, 9-14 Sept, 2008: K Jensen, ML Kristensen, L Wells (2007), Colored Petri Nets and CPN Tools for Modelling and Validation of Concrrent Systems Univ of Aarhs Denmark p 40 9 G Srgladze, I Blia, B Urshadze (2012), Transactions Georgian Technical University Atomated Control Systems 2(13): 7-22 (in Georgian) 10 T Halpin (2005), ORM 2 Graphical Notation, Nemont University Technical Report ORM2-01, September 2005, 17 p 11 G Srgladze, E Trkia, N Topria (2010), Transactions Georgian Technical University Atomated Control Systems 2(9): (in Georgian) 12 G Srgladze, E Trkia, N Topria, et al (2009), Proc of the 3 rd International Conference on Comptational Intelligence (CI 09) Jne 26-28, Tbilisi: Received Janary, 2014