COM332 – SA3

1. COM332 – SA3 Development of web-based systems

2. Web development is argued to be different • Focus is on the user interface • Multimedia nature of the web • Developers – graphic designers • Changed over the time • More complex web-based system • e-commerce • Web Information System • Information system rather than information provider

3. In the early days of e-commerce development • Requirements were not well understood and often completely un-known since web was new • No or few users

4. Avison & Fitzgerald (2003, 103-104) quote Baskerville & Pries-Heje’s (2001) 10 concepts relevant to IS development for the Internet: • They term it as Internet Time • Time pressure • Vague requirements • Prototyping • Release orientation • Parallel development • Fixed architecture • Coding your way out • Quality is negotiable • Dependence on good people • Need for structure

5. Time pressure • Any advantage is short lives and will be copied quickly • Important to take advantage of any short-term gain • Vague requirements • Imprecise or not known at all • Created through imagination and innovation • Prototyping • Prototype (not the report) is the specification of requirements • Release orientation • Early release and more frequent release • RAD?

6. Parallel development • Database development can take place at the same time as the graphical design • Requirement analysis and design are difficult to separate • Fixed architecture • Three tier architecture • Business data • Business logic • User interface • Allow the team members to work parallel

7. Coding your way out • Developers need to code their way out of problems • Quality is negotiable • Whether the software is developed to achieve high quality, a quick product or a cheap one • Quality tends to be the customer perspective and experience • Dependence on good people • Internet projects are completed under time pressure in small teams – all members need to pull the weight • Key members can make or break the project • Need for structure • Business analysts and software engineers need to work together.

8. Vidgen (2002) says if the Internet time is replaced by business urgency the ten concepts have more general relevance to understand the IS development • When time pressure and definitional uncertainty exists use more flexible strategy like RAD and prototyping

9. More concrete differences • Internet time • Development time reduced greatly • 2 years unthinkable • 6 months acceptable • Strategic implications • Directly related to business goals • E-commerce project expected to generate revenue • Emphasis on graphical user interface • Need for talented graphic designer to work with software engineers • Customer orientation • User is the customer rather than the employee • E-commerce needs customer focus and market input

10. There are also some similarities • Database • Sophisticated internet application rely on database • Integration • Internet application need to integrate with enterprise application

11. This forms the basis of WISDM

12. As internet projects become broader in scope it will require greater integration with front office, back office, legacy systems etc. • Internet projects will become more difficult to distinguish from traditional IT projects