A short article in the E-Sourcing Forum by Chris Pfauser does a concise job explaining how the determine if your processes are mature. Substitue "EDI" for "IT" as you read the story and it'll be even more relevant. If your shop is like most I've seen and worked in, your processes will probably never be completely mature, but if you head in the direction outlined in the article you'll be in good shape.
Need a little inspiration to get you through the day? Take a look at a few of the 'Top Innovation Articles of 2011' from Innovation Excellence. Many of the references are oriented toward general business, but have broad application to all professions, even ours!