Test your Department's existing public data visuals and dashboards.
Are you able to get into your public dashboard using a keyboard?
Would a user know the keyboard strokes (are they standard strokes)?
Is the tab order correct? (the order you move from one visual to the next)
If you used a keyboard and not a mouse, could you get all the same information and functionality?
Install a screen reader. If you use google chrome, you can easily install ChromeVox. If you are using Windows 10 you can use the built in Narrator application.
Using your keyboard with the screen reader, can you get all the same information and functionality a sighted user has access to?
Can you read the data and understand the key trends?
Can you interact with the dashboard easily?
Are any filters, buttons, or graphs too tiny to read or press?