Selling Boxes or Hours

Tim Berry has an excellent post on the difference between selling boxes and hours. An excerpt:

With a product business you sell more and you make more money. Succeed with online marketing, open up a new channel, and you can build more of those things. Product businesses usually – obviously not if a lot of hand labor is involved – scale up. On a classic service business, though, to double sales you have to double your payroll. That’s what investors call a “body shop.”