I think a lot of turnover comes from a lack of process and procedure. If everyone is allowed to do things their own way then no one knows if they are doing it "Right". That kind of insecurity builds and makes people nervous about their contribution to the group. The other thing process does to a business is it treats your customers the way the business intended. If everyone knows what do when something happens then there is path for solving it. 

I always try to train managers in my company www.grademiners.com/editing-help

Everyone knows what to do. And we have instructions,yeah

I wonder what would happen if ownership focused their efforts on developing the leadership team - personally and professionally.  It seems as though strong leadership leads to better retention.  From what I've seen in the industry, this is the largest area for opportunity and where we consistently fall short.  

Great points, Jason. Paying attention to hiring is the start and, to Brandin's point above, that is ultimately leadership's role. The commitment needs to be bringing on the right staff, not just filling an empty seat, and providing them the support to become successful. Your calculation of the true costs in foregone revenue and opportunity is the number leadership needs to have in mind when choosing to grow their staff. We published an article recently about hiring practices that are detrimental to business, but are sadly not uncommon in this industry.