The Design Stage
The design stage is where you decide which options go and which ones stay. Go over the list of features determined in the planning stage, and decide how you're going to implement accessibility into each one. Suppose it was decided at the planning stage that the scrolling banner was a great idea and would add a lot of interest to the application. Now is the time to decide if you want to provide an option that will stop the banner from scrolling or even remove it altogether. Maybe you want an audio clip that will read the banner the first time it scrolls by. Do you want an option to turn the audio clip off?