Final answer:
CM at Risk and DBB contracts are similar in that Design and Construction are conducted under separate contracts, with the construction phase typically starting after the design phase is complete.
Step-by-step explanation:
The query relates to two project delivery methods in the field of construction management: CM at Risk and Design-Bid-Build (DBB) contracts. It asks which aspect is common between these two methods. The answer to this question is C) Design and Construction are separate contracts. In both CM at Risk and DBB projects, the design phase is completed under a separate contract before the construction phase commences.
The CM at Risk method differs in that the Construction Manager joins the project during the design phase and provides input, but a distinct contract for construction is still formed after the design is complete. The DBB process involves bidding out the construction contract after the design is finished, typically to the lowest bidder.