spiral methodology provides an iterative and progressive approach to defining the requirements and design of your site using prototyping. Once an operational prototype is reached, the development phase of production starts and you proceed using a waterfall approach. The spiral model suggests that a series of four steps be performed before coding begins. The following briefly describes the activities in each pass of the spiral, starting in the center of the spiral.
1. Determine your objectives, your alternatives for meeting your objectives, and any constraints that must be met.
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
A traditional waterfall method breaks the workflow down into stages. You complete one phase of the production life-cycle before continuing to the next. The names of the steps are up to you and can vary and are usually tailored to your organization's style or terminology already in use. Make it work for you. The objectives of the waterfall method are to complete one phase before moving on to the next and to have the output from each task feeding into the next so that there's a logical progression of development.
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