The reconciliation of any non-GAAP financial measures mentioned on the call with the corresponding GAAP measures are described in our earnings release and our SEC filings, which can be found in our website at advanceautoparts.com. For planning purposes, our first quarter earnings release is scheduled for Thursday, May 17, 2012, before market opens. And our quarterly conference call is scheduled for the morning of Thursday, May 17, 2012. To be notified of future dates of earnings reports, you can sign up through the Investor Relations section of our website. Finally, a replay of this call will be available on our website for 1 year.Now let me turn the call over to Darren Jackson, our President and Chief Executive Officer. Darren? Darren R. Jackson Thanks, Joshua. Good morning, everyone. Welcome to our fourth quarter conference call. First, I'd like to thank our 52,000 Team Members for their hard work and congratulate them on an outstanding performance in the fourth quarter and for fiscal 2011. The team's focus and dedication enabled us to achieve new record levels of performance this year. Our continued investment in service and availability translated into industry-leading service experience as measured by NPD, while improving the efficiency of our operations. Together, these investments resulted in record profitability as reflected in our 90 basis point improvement in our operating income rate, which reached an all-time high of 10.8%. We remain on track to achieve our goal of 12%. Our improved operating performance enabled our full year earnings per share to grow 29.4% to $5.11, while our return on invested capital reached a record 19.5%. Mike will provide more specific details on the fourth quarter and our full year results in a few minutes, as well as the outlook for 2012. Our heritage is grounded in our commitment to service and is reflected in our promise "Service is our best part." Just as important, our values inspire, serve and grow are critical to how we deliver on our promise on a consistent basis. Together, our team's dedication to our promise and values resulted in record levels of customer satisfaction, Team Member engagement and financial returns in 2011.
Operationally, we set new standards of achievement in delivery speed, reliability, inventory on hand and e-commerce sales to name a few. Finally, we finished the year slightly below double-digit comps in our Commercial Business and saw sequential improvements in DIY throughout 2011.We entered 2011 by simplifying our strategies to service leadership and superior availability. Service leadership in simple terms is to help customers buy through delivering on customer expectations, which requires a relentless focus on service basics and behaviors. We made material investments in our district leadership team, the measurement of commercial delivery speed and reliability, and our service leadership assessments. Ultimately, our goal is to maximize the value of each customer engagement, whether it's when a customer walks into one of our stores, calls us or clicks on our website. Superior availability is focused on building an industry-leading supply chain through our efforts to buildout our hub network and implement our new warehouse management system. This new warehouse management system is a critical element of our state-of-the-art distribution center set to open in the fall of 2012. Kevin Freeland will provide you with more insights on our progress under our superior availability strategy shortly. I am pleased with the strategic progress we made, as well as our financial results that accelerated throughout the year. Specifically, we were able to generate a 2.9% comp store sales gain during our fourth quarter and a 2.2% for the fiscal year. Overall, our business continues to be impacted by regionality but was less so in the fourth quarter. Read the rest of this transcript for free on seekingalpha.com