Spiraling is a macro form of incremental development. The spiral method is typically used for large, complex projects that can be expensive to build.
The Spiral method allows you to make incremental investments in your site. It gives you the opportunity to launch the site one phase at a time, that is up to you. This is advantageous if you have a vision for something grand but don’t have the funds to do it all in one effort. There will be pros and cons to mini-launches that are specific to your project. insert image Spiral model (Boehm, 1988).