The Design for Manufacturing Analysis is a free service offered with an Injection Molding quote.  A Quickparts Production Engineer will review the feasibility of your part for injection molding.  He or she will review your part for proper draft, gate location, feature sizes, under cuts, wall thickness, and sink.  Your Quickparts Sales Manager will send you the report for review.  This will allow you to show the report to your team during design reviews, etc.