Business-Oriented Web Design
This presentation by Cameron Moll outlines very effectively how the business-oriented web designer, which I would argue is not the norm, will have a positive impact on your business objectives. The presentation is entitled Nine Skills that separate good and great designers, and is well worth a read if you’re designer developing your skills or a project manager interested in understanding how elements of design can forward your business objectives.
You may also be interested in my post discussing the value of design, specifically web design.