If you are not already using kanban cards, do a test in a pilot area. Figure out the nuances of using them in your environment. As you test them, build and document your process.
Once you have the shell of a process developed, roll it out on a wider scale and run it for a period of time. Some of the issues with a kanban system don’t show up unless the stars all fall into a certain alignment. During this testing period, work on ironing out the bugs so when you implement your kanban system factory wide, you’ll encounter fewer problems.