Quell Systems Limited

As well as accredited as an IBM Business Partner, Quell Systems is an IBM Partnerworld Developer.

We develop utilising the latest technologies and are largely operating system and database independent. Full design documentation and project management can be provided complying with prince2 methodologies.

In today's world Quell Systems propose that systems are implemented using web-based technologies. This involves implementation using the full J2EE architecture including: -

Java Servlets for the control tier

Enterprise Java Beans for business logic

Java server pages for the presentation tier

The choice of operating system and RDBMS is relatively flexible. we would propose that IBM WebSpehere is used as the application server for the J2EE environment, and it should be noted that IBM DB2 is the database of choice for WebSphere and either IBM AIX or LINUX running the IBM HTTP server is a good operating environment. However, it is perfectly possible to run WebSphere on Windows NT with DB2 or SQL if desired.

The main advantage of a web-based development is for speed of access over slow Wide Area Network links. All processing is carried out on the server side, leaving the browser merely to deal with the user interface. Sensible design of web presentation means that the system is more than tolerable over the slowest of links.

If the system is intended only for use on a Local Area Network Intranet, then some of the advantages of such an approach are lost.

In general the advantages of this approach can be summarised as follows: -

Future proofing

It is anticipated that most new developments will be web based and such an approach should give the system a greater longevity.

Modular approach

Development of systems using a MVC 3 tier architecture means that the control logic is separated from the business and presentation logic, allowing for greater code

re-use and potential cost savings during the development cycle.

Wide Area Access

The system could be accessed from any point in the world using a local internet connection. Necessary security could be implemented using firewalls and Secure Socket Layers.

Ease of installation

Any client can run the system, providing they have a web browser. Any remote user can access the system providing they have a web browser and access to the internet.

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