Also known as: ISO 17020, ISO/IEC 17020:2012, inspection body accreditation.
What assessors look for
Evidence that every inspector is qualified for what they sign, that equipment is calibrated and traceable, that procedures are approved and current, that reports are complete and controlled, that complaints and non-conformances are handled, and that management reviews and internal audits happen. Most of that evidence is records.
ISO/IEC 17020 and AMPS
AMPS is software and holds no accreditation itself; what it does is keep the records an assessor asks for in one place: personnel and equipment certificates with expiry flags, calibration documents, a report folder per job and a history of every action. Documents saved through AMPS live in your own OneDrive, SharePoint or Google Drive, not on AMPS servers, so an existing QA folder structure keeps working unchanged and everything stays yours if you ever stop using AMPS.