Automotive suppliers are EDI veterans and have been into EDI for a long time. But it used to be relatively uncomplicated because of the industry’s business model: just ship a lot of a few assigned parts, on time, without defects. The OEM ran huge assembly plants and put the whole vehicle together. But things have changed. Many first-tier suppliers are now responsible for “systems” (really sub-assemblies) and rely on lower-tier suppliers. As their role changes, so does the complexity. Let’s look at a typical supplier who used to manufacture just rear-view mirrors.