Many retailers count on the winter holiday season to deliver sizeable sales and profits. For J.C. Penney, this year will be a test of survival. Since 2011, the 112-year-old department store chain has lost $3 billion as two different CEOs whipsawed employees and customers alike with radically different business strategies. Now a third CEO is due to take over in August. Along the way, J.C. Penney's IT group has seen three CIOs, one CTO and three ecommerce leaders.