How You Will Do It
The specifications documents are the last in the sequence. As with the requirements, you may have technical and functional versions. These track all your decisions and define exactly how you're going to build the project.
 

 
If you've followed the sequence, then there will be few surprises at this point. In the specifications, you'll write down all the final choices, the technology you will use, the vendors, the sequence of implementation, etc. Then you'll walk through every step of every process in detail.

Cut Development Confusion
The functional specification describes everything your user (or visitor) will see and use. Think of it as everything from the screen up to the user. Here you define every field, every button, every word of text, all the steps in your process, etc. The development group uses this document to create the technical specification.

The technical specification describes everything that happens on the back end. Think of it as everything behind the screen. This specifies the data structure, the field lengths, the code behind the buttons, etc.

The specifications (and often the requirements) will use wireframes, menu structure diagrams, site schematics, as well as page tables, all of which help design and development visualize and deliver the project.

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