We haven't had a good round of EY bashing for a while, so it seems only fair that we have one now. For the life of me, I cannot understand why EY keeps coming in for such criticism from those who have obviously never worked for EY, but it does.There are definitely a few genuine posters on here with insights and legitimate gripes about life at EY -- same as at any firm. But the number of people who hold strong opinions about EY but have no vested interest is what really confuses me. Lots of sour grapes who didn't make it through interview, perhaps?To answer the question about the Supply Chain interview, it is reasonably straight-forward. Your interview generally lasts about 2 hours and is split roughly between a walk through your CV and background, a discussion about what EY are all about and how you might fit in, and a case study.The case study is not rocket science. It will outline a case (duh!) of a hypothetical client. Based on your experience and insights, you will be expected to talk about various elements of the case and make some recommendations. Generally people fall into two camps: those who can handle the case study easily with minimal preparation (because they are well qualified and understand their subject area) or those that struggle because they lack a consulting background or deep enough subject matter expertise. It is no surprise that candidates generally fall into one of these two camps: the purposes of the case study is to separate those who know their stuff from those who don't!So my advice is this: if you know your subject matter well, and you understand the consulting relationship with a client, you probably have very little revision to do. Most important is to think about how you structure and present your response -- clear, concise thoughts; insights backed up by either facts or clearly stated assumptions; etc. It's okay to have an opinion as long as you can justify it; similarly, it is fine to make assumptions as long as you can justify them.Good luck.