Peer review is central to the process of modern engineering. Open peer review gives the impression that decisions are arrived at in a fair and meritocratic manner with an objective, reliable, consistent process. It is responsible for identifying methodological flaws and for improving the quality. Assistance from somebody in the same discipline is valuable. Clients refer to reviewers as referees since they help to determine the fate of a design. The client sets up a hanging committee to carry out open peer review to decide whether a piece of work should be accepted, revised or rejected. Reviewers in similar specialties make up a professional group. In an open peer review refereeing a retaining and protection structure design of building foundation pit excavation, an outside expert as an assessor, might master the art of review to pay attention to guarantee consistency of processes and outcomes.