Acronyms  N_SRMGSA_202003 Originally published March 2020  Uncontrolled copy when downloaded  N-1  ACAT Acquisition Category  AC  Advisory Circular  AIR  Aircraft Certification Services  AJI  Safety and Technical Training  AJM  Program Management Organization  AJR  System Operations Services  AJT  Air Traffic Services  AJV  Mission Support Services  AJW  Technical Operations  AL  Assurance Level  AMS  Acquisition Management System  ANG  Office of NextGen  AOV  Air Traffic Safety Oversight Service  ARP  Aerospace Recommended Practice  ASOR Allocation of Safety Objectives and Requirements  ASR  Airport Surveillance Radar  ATC  Air Traffic Control ATM  Air Traffic Management  ATO  Air Traffic Organization  ATO-SG  Air Traffic Organization Safety Guidance  CC  Configuration Control  CCB  Configuration Control Board  CM  Configuration Management  CNS  Communication, Navigation, and Surveillance  ConOps  Concept of Operations  COTS Commercial Off-the-Shelf  CRD  Concept and Requirements Definition  CRDR Concept and Requirements Definition Readiness  CSA  Comparative Safety Assessment  DAL  Development Assurance Level  DID  Data Item Description  EA  Enterprise Architecture  EOC  Executable Object Code  EP  Execution Plan  EST  Enterprise Safety Team  FA  Functional Analysis  FAA  Federal Aviation Administration  FAST FAA Acquisition System Toolset  FFBD Functional Flow Block Diagram  FHA  Functional Hazard Assessment  FID  Final Investment Decision  FLS  Fire Life Safety  FM  Formal Methods  fPRD Final Program Requirements Document 