For any information system to work properly, the infrastructure needed to make into a system is very important... Infrastructure is nothing but the the phyiscal components that are required to make up the system. Once the infrastructure is decided upon, the architecture needs to be decided upon, whether it would be a open[interact with systems of other systems] or a closed system [ act as a standalone or have difficultites in connecting to other systems] . However an important thing to remember is an OPEN SOURCE is not the same as OPEN SYSTEM.
The main reasons for creating a ES infrastructure is to integrate all the exisiting process and for streamlining them. It also reduces cycle time and manage inventory better. Basically it will help in improving the efficiency of the overall business.
Some of the important characteristic of ES system is its modular construction. the system can be installed in modules. this provides the flexibility to the business to install only those modules which the business requires. Further it provides a central DB, wherin all information is available at one single location. Further the ES system , gives the flexibility to configure the system or customize it as required by the company. SAP offers more than 8000 confguration tables [ Source: Dr Vijay notes]... It also follows a three-tier Client-Server architecture where all the processing is done on the server side and the input/output is done on the client side. The clients have come a long way from being just dead terminals to smart terminals. They have certain powers to process the data themselves. It also provides variable interface, wherein different interfaces can be configured as per different requirements.
The important technologies required for a ES system implementation is Hardware, OPerationg System, the required middleware/Bolt Ons , the required network infrastructure and if need be the web services to integrate the interent capability.
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