Commissionability Reviews, Why?
Quality, Consequences and the Construction Industrial Complex (part 323).???
Who the hell are you to review our design??
I have been asked this question several times over the years when I have been introduced as the LEED CxA or CxM and explained my scope of work at the kickoff meeting. In certain countries, that shall remain nameless, the reaction to announcing a Commissionability review of design and IFC documents can best be described in the image below.?
So why the reaction??
Face, pride, possible financial consequences, who really knows? However, building design and construction is a strange business where in my experience, design errors and omissions are paid for by the client not the design firm at fault.?
In my opinion, 80% of all problems on a project are "baked into the cake" at design stage i.e. contained within the IFC drawings and specs. Research in the UK by BRE found 50% of defects in construction are design problems. This means there is an opportunity to address 50% to 80% of problems before they physically manifest on the job site.?
Why do a Commissionability design documents review??
Because it is value add. Issues identified pre tender can be fixed on the "drawing board" for minimal cost.?
Quality can be managed into a project pre-tender for almost zero cost. However, post tender, it is a game of quality control and change orders. Even the USGBC recognize this issue by requiring Commissionability design documents review as part of the Enhanced LEED Commissioning credit.?
Commissionability reviews are primarily concerned with 3 things:
Good practice observations plus errors and omissions identified are not the responsibility of the Commissioning engineer / manager, but are consequential benefits from the commissionability review.
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The fundamental question is: “are the systems Commissionable and consistent with the AHJ requirements and owners project design brief (OPR)?”
What is best practice?
Best practice consists of two Commissionability design reviews at:
Deliverables consist of:?
The ROI on?Commissionability design reviews can be high. On one project my team identified 225 unnecessary multi-leaf VCD's on the inlet to VAV boxes. It was a designer copy and paste error. They were removed in minutes by the CAD technician and over $70k USD was saved.?
Commissionability design reviews are low cost, high value. Why not do it??
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? ESG_SCOPE3_SUSTAINABILITY ? ELECTRO MOBILITY ? DATA CENTER & NET-ZERO bldgs ? COMMISSIONING & QA/QC ?Integrative_Design - digital twins/BIM You can hire me; I am globally ubiquitous
2 年Commissioning team
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2 年Spot on Adam, such an important topic. You add some real clarity here in that the client (not the designer) ends up paying for the issues. Huge opportunity to add real value and also direct us to much more operationally efficient buildings. It is a no-brainer!
? ESG_SCOPE3_SUSTAINABILITY ? ELECTRO MOBILITY ? DATA CENTER & NET-ZERO bldgs ? COMMISSIONING & QA/QC ?Integrative_Design - digital twins/BIM You can hire me; I am globally ubiquitous
2 年The picture describes the Design team attitude facing Cx “pair revision”, this always happen when the Owner includes commissioning at the very last time, when PM, Consultants, GC & subcontractors and -of course - Design team for every installation system have been started or worst finished the Construction Documents and everything is ready to break ground …