Karanko A.S. Research of network technologies for construction of ERP - systems

Motivation

Importance of work

The importance of the given work consists in association of ERP-systems with a multiservice corporate enterprise network which in turn includes such services as: data transmission, telephone communications, a videotelephony, the Internet, a fax.

The purpose and research problems

The purpose of master's work is designing a multiservice corporate network on the basis of close corporation "Donetsksteel" and its integration with system of enterprise resource planning - SAP R/3.

For performance of problem put by it is necessary to solve the following tasks:
- To design a multiservice corporate network
- To execute the forecast of the traffic of a network on the basis of use the neural networks
- To execute the comparative analysis of existing ERP - systems
- To analyse network technologies for construction of telecommunication infrastructure in ERP - systems
- To realize the computer model of the received network

Scientific novelty

Scientific novelty of the given work is an integration the system of enterprise resource planning SAP R/3 and a multiservice corporate network.

Practical value

Practical value of the given work is development of a network which will allow to optimize all variety of internal and external processes of the enterprise.

Research of network technologies for construction of ERP - systems

ERP-systems is a set of the integrated applications which in a complex, in uniform information space support all basic aspects of administrative activity of the enterprises. For today there is a set of realizations of ERP - systems at industrial and other enterprises. The given realizations differ according to requirements of the given enterprise - complexity of processes, size of the enterprise, amount of users, the platforms necessary for introduction of ERP - systems.

One of constituent of the future network will be a multiservice corporate network which unites in itself all basic enterprises of the close corporation "Donetsksteel" in Donetsk region.

I have calculated the traffic of the given network for each remote office separately. The formula for calculation has the following kind:

Y _i ^(k) = B _av ^(k) * N _{sub. i} ^(k) * T _av ^(k) * f _{call. i} ^(k)

The full design procedure is given in library of master's work - The full design procedure (in russian).

Findings presented in table 1.

Table 1 - Resulting value of the traffic for sites of a network.

Site	Ó_int. , Kbit/s	Ó_{cont. sites} , Kbit/s	Ó_ext. , Kbit/s
Central office	55642	2493	36170
public corporation „Vinter”	392	2188	-
close corporation „Donetsksteel - MP”	81900	16200	49600
st. Cheluskincev 174b	87	1626	-
public corporation „Yasinovskiy chemical-recovery plant”	10142	8362	-

The further analysis of various technologies for construction of a network for the given traffic and services of communication was carried out. According to the table it is visible, that optimum variant for the removed offices will be technology Ethernet 100-Base.

Using these data I have constructed the function chart of a network. The central office given in figure 1.

Figure 1. - The function chart of a network.

The equipment for construction of a multiservice network was chosen. Further I plan to create a way of an estimation of loading on a line with the help of use neural networks. The algorithm will be constructed on use of a method "learning by instruction".

In ERP-systems are used technologies ATM, Ethernet for construction of a network of data transmission. However, technology Ethernet is most distributed. The big market supporting Ethernet devices and components, mass production of similar products guarantees their low enough cost.

Decisions on Ethernet base offer Echelon, Phoenix Contact, Schneider Electric, Siemens. Requirements to hardware of ERP - systems also are great enough. In a segment of servers the equipment prevails on the basis of architecture x86, recently with support of 64-digit expansions.

The architecture of system R/3 is based on three-tier model architecture of client / server. The user queries are transferred from a presentation level to a level of applications R/3. Actual calculations and estimations here are carried out. Necessary for these data are requested from level of database. The similar distributed system may serve more than 5000 users.

Resume

The theme of research mentioned in given master's work is actual. For today there is a set of realizations of ERP - systems at industrial and other enterprises. The given realizations differ according requirements of the given enterprise - complexity of processes, size of the enterprise, amount of users, the platforms necessary for introduction of ERP - systems. The developed structure of the ERP - system and a multiservice corporate enterprise network unique in itself. Uniqueness also consists in use of neural networks for forecasting the traffic of data transmission in a main line. Further it is planned to execute the forecast of the traffic of a network on the basis of use of neural networks, for this purpose the package MathLAB will be used. To realize computer model of the received network after a choice of network technologies.

The list of the used literature

1. Corporate networks and control systems, tendencies of development in Russia.
Alexander Alexandrov's article. It is published in magazine "Computerra" ¹42 from October,20,1997.

2. Platform for ERP
Evgeniy Patiy's internet-article which calling "Platform for ERP" íà http://citforum.ru/ . The basic problems of a choice of the equipment for ERP - systems, the characteristic of the given equipment are described.

3. Liane Weel. SAP R/3. System administration. Publishing house Lori. 1999.

4. Cit - forum
The forum devoted to modern information technologies: programming, databases, information safety, ERP- systems. Contains a plenty of articles.

5. http://www.sap.com/cis/index.epx
The Russian-speaking site devoted to representation of a product of system SAP.

6. http://www.galaktika.ru/2/products/galaktika/
The Russian-speaking site devoted to representation of a product of system Galaxy.

7. http://www.omega.ru/
The Russian-speaking site devoted to representation of a product of system ABACUS Financial.

Karanko Andrey Stepanovich

The abstract on a theme of master's work