Design-Build

Design-build is a project delivery method where a single entity is responsible for both the design and the building process. What that means is the designers and builders are working together using a single contract throughout the project life cycle. Moreover, the aim is to create an efficient project delivery. This method is ideal for simple tasks or technically complex projects that require a diverse team of experts.

In short, it means architects, engineers, and contractors are working from the beginning. The design and building phases can overlap. As a result, it leads to a quicker finish for the project. This method improves communication and fewer conflicts between designers and builders. Therefore, the turnaround for each project is much quicker than a normal construction project.

What are the 5 phases of the design-build process?

In this method, the five stages are selection, pre-construction, design, construction and post-construction. Each of the steps complements the previous one, ensuring the smooth and efficient delivery of the project. On top of that, it is useful to reduce risks, improve communication, and deliver better outcomes.

Each phase of design-build has specific goals, deliverables, and responsibilities. Following this properly helps to ensure that nothing is overlooked. In particular, this method involves multiple fields. The steps create key checkpoints where collaboration is formalised and decisions are made together. This will prevent confusion and miscommunication. For more details, here are the five phases you need to understand.

Selection

The first step the owner should take is choosing the right contractor. It starts with the owner defining the goals, budget, timeline, and performance standards of these types of projects. Then, they can create a Request for Proposal (RFP). All of this is to ask the potential contractors to submit qualifications, conceptual designs, and cost proposals. The owner can choose it based on price, technical capabilities, experience, and overall value.

Pre-construction

After selecting the design-build team, the owner will work closely with them to finalise the project scope and initial design. The owner and team will find an agreement on major design decisions early to avoid costly changes later. This way, both of them will have the same mind on scope, budget, schedule, and expectations before construction begins. Here are the key activities from this stage:

• Site analysis and surveys
• Establishing project schedules
• Risk assessment and mitigation planning
• Developing conceptual or schematic designs
• Preparing a cost estimate or guaranteed maximum price (GMP)

Design

In this design-build phase, the team creates detailed architectural, structural, and engineering plans. Designers and builders trade inputs to find buildable designs whose materials and methods are cost-effective and comply with building codes. The purpose is to create a set of plans that guide the building process and match the goals of the owner.

Construction

During this phase, the active construction of the design-build has begun. The builders can start the process even though the design has not finished, which is called fast-tracking. The design team stay involved in answering requests for information (RFIs), reviewing shop drawings and submittals, and ensuring the work matches the intent of the design. Meanwhile, the owner will keep in touch by seeing the progress report and direct site visits.

Post-construction

The last step of the design-build project is the post-construction. Therefore, the team transitions to project closeout and turnover. The purpose of this phase is to deliver a fully functional, safe, and high-quality building to the owner. Therefore, the key activities that might happen in this stage are:

1. Final inspections and testing
2. Punch list completion or fixing minor issues
3. As-built drawing and documentation handover
4. Training the owner on systems and equipment
5. The warranty period begins