After two phone interviews, I was invited to an on-site interview. I was given a case study 48 hours prior to the interview, then asked to draft up our solution to the hospital's proposed problem. After the presentation to three members of staff (each representing a separate department), we took an hour long Excel test that assessed ability to use pivot tables, vlookup, etc. That was followed by a 30 minute panel interview with 3 different staff members.