The answer is 4 George's critical path type schedule would have slack. The critical chain has buffers. Slack is the random mathematical outcome of the project network. Thanks in advance for your help and time. It probably wasn't what you were looking for and it won't help you pass PMI certification today, but my guess is that it will help you pass it if you take it in a few years.
Computers are useless.
They can only give you answers. The source of this page is a posting made by Frank Patrick to one of a variety of online discussion forums, most likely an e-mail discussion list. There may even be typos until an opportunity arises to clean them up for more formal presentation. Despite these minor shortcomings of style, the content is worth sharing. This link will lead to a paper on the key attributes of a TOC Multi-Project Management environment.