The standard establishes a range of quality indicators for escalators included in the terms of reference for research work to determine the prospects for the development of this project
GOST 4.476-1987 Referenced Document
GOST 21623-1976 System of technical maintenance and repair of equipment. Characteristics for evaluation of maintainability and rapairability. Terms and definitions
GOST 4.476-1987 history
1987GOST 4.476-1987 Product-quality index system. Escalators. Index nomenclature