We needed to turn an engineering prototype into a product with an agressive schedule. A lack of developer resources threatened to push back design changes until after release.
I was able to convince developers to allow me acess to souce code and make only CSS and HTML changes to transform the appearance without changing the existing back-end code.
Although I didn't design the scanner or it's control panel, the icons and colors of the app were designed to look good on the control panel.
Our starting point was this engineering prototype.