Which of the following are the four main delivery methods?

The selection of the four main delivery methods as Design-Bid-Build, CM @ Risk, Design-Build, and IPD accurately reflects the predominant strategies used in construction project delivery.

Design-Bid-Build is a traditional delivery method where the project is designed first, then bids are solicited from contractors to execute the construction based on those designs. This method is characterized by a clear separation of responsibilities between designers and contractors.

CM @ Risk, or Construction Management at Risk, introduces the construction manager early in the project to provide advice on cost and scheduling during the design phase while also taking on the risk of delivering the project within a guaranteed maximum price once construction begins. This collaborative approach offers greater flexibility and can often lead to enhanced project efficiency.

Design-Build is an integrated approach where design and construction services are contracted together, allowing for greater collaboration between the project team members. This can result in faster project delivery and cost savings since it streamlines communication and decision-making processes.

Lastly, Integrated Project Delivery (IPD) is a method that brings together all key stakeholders early in the project to share risks and rewards, ensuring that everyone has a vested interest in the project’s success. This approach fosters cooperation and innovation, which can lead to improved project outcomes