Hi,although I do not know the answers to your questions, I thought I could tell you a bit of what I know about CDD.Its a practise that is mainly used now in the US and UK. Now moving to Europe as many PEs are starting to ask for it. A couple of firms in the Big Four let employees from CDD move into Strategy work, it depends, but work is relatively similar. They do work very closely with Consultancy anyhow.CDD depends on the M&A situation. Now its booming. Next year its likely to be the same, who know in 3-4 years. I cant compare it with ODD, because I haven't done it. It's likely that the line between ODD and CDD is blurred.Hope this was helpful.