"This publication contains a description of the attributes for operating a testing and certification scheme as it relates to establishing the characteristics of ""interoperability"" between devices and systems associated with the electric grid. For the purpose of this scheme@ the term ""interoperability"" is intended to convey the ability of two or more devices or systems to seamlessly pass electrical current and readily exchange and use information during the course of its normal duty cycle. Items considered in-scope include: a) the identification of use cases for the purpose of testing b) the selection of standards that apply to that use case c) the identification of environmental conditions necessary for testing to that use case d) the identification of a TSS that incorporates all of the above e) the relationships between the various entities involved in the testing: i. ITCA ii. AB iii. CB iv. T f) the management aspects associated with the implementation of a testing program based on THE SCHEME: i. Handling related families of products ii. Exception handling for variations in manufacturing processes iii. Grievances against participating entities Items considered out-of-scope include: a) individual testing procedures associated with a TSS b) specific techniques for accomplishing market surveillance after certification testing"