PERFORMANCE MEASUREMENT OF HEALTH, SAFETY AND ENVIRONMENT (HSE) OF EXECUTIVE CONTRACTORS IN WATER AND WASTEWATER ORGANIZATION IN GUILAN PROVINCE USING QUALITY COEFFICIENT MODEL (Q), BASED ON DEMING CYCLE. (2016). Arabian Journal of Business and Management Review (AJBMR), 5(6), 47-54. https://doi.org/10.65453/ajbmr.v5i6.896