Progressive design-build (PDB) is a method of project delivery that integrates the design team and the builder into a single design/builder team from the project’s outset. Whereas traditional design-bid-build (DBB) projects operate in distinct, separate phases, progressive design-build incorporates members of the design and construction teams into a continuous process of design and construction. This method continues to see increased use across engineering disciplines, but it’s not just for big projects. Indeed, it provides to system integration projects several benefits not offered by other project delivery methods.
About the Author: Jacob Haugen
Jacob Haugen is communications director at Portland Engineering (PEI, www.portlandengineers.com). PEI provides engineering and systems integration services to partners throughout the Pacific Northwest. PEI is a member of the Control System Integrators Association (CSIA); see the company profile’s on CSIA’s Industrial Automation Exchange, www.csiaexchange.com.
System integration as a design/contracting discipline is a process that involves bringing together component subsystems into a whole and ensuring that those subsystems function together. System integration requires a detailed and thorough understanding of the many processes going on within a given facility and the practical ability to bring them together in a way that enhances the client’s value and productivity without compromising the system’s longevity or robustness.
Every process in a facility is ultimately managed in your control room, so it’s crucial to have confidence that your system does what it is intended to do – optimize value, minimize risks, and help alleviate human error – reliably and consistently. When you invest significant resources and cost into your facility’s infrastructure, it makes little sense to cut corners on what is effectively the brain of your process – and yet this can be the inadvertent consequence of separating the design team from the builders.
Because of system integration’s place as a final step in construction, system integrators are typically far removed from the initial design phase of a given project. By the time a traditional DBB project design specification reaches the system integrator, it reflects set criteria. System drawings, dimensions, ergonomic factors, aesthetic factors, cost, maintenance that will be needed, quality, safety, documentation, and description are already finalized. And this specification, as all system integrators will understand, is more of a theoretical/conceptual estimation developed in good faith by less-than-practically-experienced engineers in the field of system integration. Just as no battle plan survives contact with the enemy, no design engineering specification survives contact with the system integrator, and the changes before implementation almost always benefit the owner.