What can work well is to get the people doing the work to change the process - they know the practicalities of it better than anyone, so why not let them make it work better for them.
Start by getting some of them together to find out what frustrates them (you will need to be firm and keep them focused on process, not other stuff), find a consensus, prioritise them in terms of level of frustration and ease of addressing, then explore ways of resolving those issues. If you can get them to drive the initiatives, implementation becomes much easier as the people involved will champion it with the others, and building the business case for them takes less effort.
If you start small and get some quick wins, other initiatives will spring up and the whole process can become self-perpetuating.