I think that oftentimes, manufacturing and engineering are asked to work in parallel while being completely at odds philosophically.
Engineers deal with a lot of different possibilities, and have to narrow those possibilities down into the best solution. I feel the job calls for a high level of creativity - balanced by structure - focused on multiple possibilities, and future orientation.
In contrast, manufacturers are making ideas a physical reality, and they are a little more burdened by budgets, the demands of operations, the production schedule, etc. (Not to say engineers don't get bogged down by those things) but it seems like the departmental goals are ultimately very different. Manufacturers need to worry more about the here and now, and I don't see that pressure on engineers quite as much.
I think the differences in charters causes engineers and manufacturers to form very different beliefs about how things should get done. Engineers want to make changes rapidly and manufacturers seem a little more hesitant to make huge changes.
Not 100% sure why it happens this way, but engineers I've talked with say they've experienced major disconnects between engineering and production—particularly when it comes to managing the bill of materials (BOM) and changes.
Has anyone out there experienced this?