One, own the project, think of what is the best approach - maybe a rewrite... Fess up, let them know what is wrong (since you aren't the one that created the m

One, own the project, think of what is the best approach - maybe a rewrite... Fess up, let them know what is wrong (since you aren't the one that created the mess, offer to be the one than can fix it... if you can do...). Do triage examples on what is there, offer solutions to potential problem points, give examples of a more perfect world. Make sure to point out things that worked good ideas (you are going to hurt feelings, but never tell them the whole concept was idiotic. Show there was good effort and value created in the current system - probably the analysis was spot on, and that's when a lot of the problems were realized and now it needs a rework. An excuse wont look good on a resume.