Ever read the comic Dilbert? Okay, kidding aside, they have teams for different aspects of infrastructure, like building servers, network admin, database admin

Ever read the comic Dilbert? Okay, kidding aside, they have teams for different aspects of infrastructure, like building servers, network admin, database admin, security, etc. Then they have areas dedicated to systems for item tracking, training, accounts receivable, accounts payable, benefits enrollment, etc. Within these areas, they have teams of project managers, programmers, QA, and 2nd level support. Another large chunk of the building is dedicated to 1st level support and middle management. There's R&D guys and there's technical experts who look at how the different systems fit together and help with strategy for the technical aspects of the big picture. Then there's the walmart.com guys who are actually in California. And there's teams dedicated to the mobile sites for walmart.com and samsclub.com. And there are meetings, lots of meetings. And process. Lots of process. To install any small change will probably take you 3 days if its an emergency. Otherwise, expect a week minimum. Projects in more recent years take upwards of 1 to 2 years to complete, using the waterfall methodology.