i promised customer thought but wanted to mention the power of competition. Competition between teams and lines is valuable. Find ways to make it happen.
I found out long ago that 1=1 and 2=3. One salesman will work, but a second comparable will get both to work more because of the competition. That competition can get you to three without any more work on your part. Two shifts on same product can be similar.
There are many ways to get workers to do better, but competition is one we should not forget.