RFI or SQ
Site queries, also known as Site Query (SQ) or Requests for Information (RFIs), are formal communication tools used in Engineering, Procurement, and Construction (EPC) projects to address questions, clarify uncertainties project specifications, or resolve discrepancies that arise during the construction phase of a project.
NCR
NCRs, on the other hand, are formal reports that document instances of non-conformance, or deviations from project requirements, specifications, or industry standards. NCRs are typically issued by quality control personnel or inspectors and are used to identify and document issues with the work being performed.
A Corrective Action Request (CAR) is a document used in project management to request corrective action to be taken when an issue or problem is identified.
In the context of EPC (Engineering, Procurement, and Construction) projects, CARs may be used to address issues related to the design, procurement, or construction phases of the project.
Although not always, NCR and CAR are in close relationship.
