Inspections in North America are standardized under NASSCO's Pipeline Assessment Certification Program (PACP). PACP gives inspectors a common coding language for defects (cracks, root intrusion, offset joints, corrosion) along with a severity grading scale. Results from different inspectors and different projects are then comparable, rather than a subjective narrative.
That standardized defect log, timestamped against the video, feeds directly into engineering decisions. It is usually the primary evidence used to decide whether a given pipe segment needs point repair, full lining, replacement, or nothing at all. CCTV inspection is frequently a bid item in its own right: either as a pre-design condition assessment that determines the rehabilitation scope, or as a post-construction acceptance requirement to verify the finished work. A completed PACP-coded inspection is often the single most information-dense document in a sewer rehabilitation bid package, since it is what the rehabilitation scope was designed around. Nonlinear extracts defect counts, severities, and locations from that data.
