Here are some things your Technical Program Committee should be on the lookout for:
Further guidance on how to ensure a high-quality conference proceedings is available in this White Paper.
In order to screen for the risk of plagiarism, conference organizers are encouraged to use CrossCheck as early as possible during the paper review process. Since CrossCheck detects content similarities that may turn out to be problematic, IEEE encourages technical program committee chairs to screen their authors' submissions prior to publishing the proceedings. This will allow the chair to take any necessary editorial actions without delaying the publication of the proceedings and, more importantly, the posting of the proceedings in IEEE Xplore.
IEEE conference technical program committee chairs can register for CrossCheck through the CrossCheck Portal.