It can be protracted, taking weeks to months once you do score an interview date. Interviews themselves can be 4-6 hours long over multiple days with multiple panels. I suffered through 2 phone screens, 2 on-sites and two more phone interviews for a total of 13 hours spread across 2 months only to be turned down, no one remembering me or why I was rejected and then a year later hired as a contractor for 13 months in the QA department. This was just a BA position in the beginning.