I've recently assumed the responsibility of shifting the design culture at a very technology/feature-focused company. (Our "product" is a web portal that customers use to manage the lifecycle of digital certificates)
Currently, our "tech team" (software engineers & product owners) create mockups of new task flows in Excel by taking screenshots of the existing UI and drawing shapes/making notes on top. I feel that this practice informs the end product and would like to move away from it.
I'm planning to embrace the Twitter Bootstrap UI elements in an upcoming overhaul and I'd like to restrict the mockup process to just those elements (i.e. so that the tech team can only create new task flows using this group of UI features)
My vague plan is to deliver the assets as bitmap images (though I also have them as vectors) along with some general layout grid templates, and recommend one piece of software that they all should work in (for consistency).
So my questions are:
How do I best deliver this mockup toolkit?
Am I just being anti-Excel, and should I just let them stick to what they know?
Would Powerpoint be a better tool in this case (as an example of software that can be used for layout and that they already have and use?
Is it worth putting in the effort, and trying to get them to change their workflow and use a tool that was more specific to the task, and what might that be?
(I should point out that they are all non-native English speakers, so that's a consideration)