the question is a little bit unclear. generally, you need to have a QA policy, plan and procedure to make sure that the quality level of the project and its deliverables are maintained.
But I think your question may refer to QC team. Saving Changes...
As Sergio indicates, on construction projects, quality specifications are normally part of the building and other codes of the local area. Achieving these is done through a number of the standard quality tools such as inspection, checklists, and so on, as well as procuring materials which meet or exceed those quality specifications.
Within the Construction Industry, In my opinion, there are 3 levels of Quality Controls.
1) At the highest levels- The Contract between the Owner and the Contractor requires submittal of a PQP- Project Quality Plan- which describes how the Contractor will Control Quality at every level of the Execution Process. Usually, the Contractor will be required to provide all Inspection services for field activities and will be required to have a RATIO of QC Engineers to workers in the field. On a recent Project, I was required to have 50+ QC Inspectors in the field (2500+ workers). We also were required to Inspect the Manufacturing process and testing of our Key Procurement items (Transformers, Switchgear, Generators, HVAC Equipment, Cables) at the manufacturing facilities. These were categorized by Levels 1-4 and were identified within the PQP.
2) Owner Rep/Developer, Design-Build- We required the Contractor to submit his PQP and follow it with his Inspection activities in the field. However, we employed our own Quality Control Engineers dedicated to our Project who provided all Final Type Inspections prior to pouring concrete, closing forms, MEP Installations, Underground Utility Installations, etc. We were acting as the Municipality- but our PQP and Quality Inspection personnel were dedicated to the High Rise Project only.
3) In the Private world- Our forces followed my Quality Control Plan. Our internal forces supervised and Inspected all installations for all the trades, and scheduled the corresponding Inspections through the municipality. The Municipal Inspector passed or failed the Inspection and approved or denied the ability to proceed to the next step. My Laborers in the field were so proficient at this process they had a 10 year run of never failing an Inspection by the Municipality. It really boils down to the "Will" of the Project Manager to communicate to the execution team his priorities of Safety and Quality.
Hope this helps!
From the trenches!
M Saving Changes...
We use ITP (Inspection Test Plan) to ensure all national standards or the company standards are met, This would have all the subject areas that need to be inspected. For Ex. if you have a steel structure, the thickness of the steel needs to be confirmed. The galvanization on the steel needs to be confirmed. There is item on the list that says white rust is not acceptable. ITP usually gets created by the contractor performing the work, but gets approved by the client, to ensure there are no missing items on the ITP. Once the ITP is approved, After the installation or after receiving the material, the ITP sign off is required. ITP signoff can be done on, ongoing basis. If something does not meet the standards, a Punch list is created. Contractor gets certain days to complete the punch list items, which is usually dictated in the contract. Once the Punch list is completed a final inspection is scheduled to ensure that Contractor did eventually complete the entire punch list item. Once the ITP is signed off by both the client and the contractor, it becomes an official document confirming that CN was done as per all the standards identified. Saving Changes...