The objective of a phased approach to development is to break your site into individual components or features that can stand on their own. You start with a needs analysis, identifying the purpose of your site. For instance, assume your site will be a combination of an e-commerce site, library site, community site, and a product brochure site. You can proceed one of two ways.
1. Collect requirements and create a design for the entire system (all parts) and then develop each part one phase at a time
When using open source systems, you can use thousands of features simply by turning them on. You don't have to create the code for the functions you need, just activate them; saving time and money. It's pretty cool stuff. But, the benefit in using open source systems can also be a big challenge when it comes to coordination different aspects of a project. Not everything exists in harmony- even when it is easy to turn on or off- and project planning/development methodologies can mean the difference between reaching your goal and just not.
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