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ASHRAE Guideline 20-2010 (R2016)
Documenting HVAC&R Work Processes and Data Exchange Requirements
This Guideline a. defines methods for documenting use cases and data exchange requirements related to HVAC&R activities involving equipment, systems, design services, and other services over the lifecycle of capital facilities.
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. [ashrae]