An anonymous reader writes "I was recently talking to a friend about the Fortune 100 company she works for in IT. She told me the company has 35,000 employees, including over 5,000 IT employees — and it's not a web firm. It has numerous consultants doing IT work as well. To me, from a background where my last job had 50 IT employees and 1,000 total, a 1-in-7 ratio of IT employees seems extremely high. Yet she mentioned even simple changes to systems/software take over six months. So, what ratio does your company have, and what is reasonable? How much does this differ by industry?" I'd be interested to see how much it differs by OS platform as well.