FOR THE FULFILLMENT OF THE GENERAL OBJECTIVES OF AN INDUSTRIAL INSTALLATION, IT IS ESSENTIAL TO HAVE AN EFFICIENT MANAGEMENT THAT PRIZES TO OPTIMIZE PRODUCTIVITY AND GUARANTEE CONDITIONS FOR SUSTAINABILITY AND BUSINESS COMPETITIVENESS. IN THE SPECIFIC FIELD PERFORMANCE FIELD IN MANUFACTURING COMPANIES, THE CONCEPTION OF METHODS IS NECESSARY, WHICH BASED ON THE KNOWLEDGE OF THEIR SPECIFIC TASKS AND ACTIVITIES LEADS TO MANAGEMENT MODELS AIMED AT REDUCING ASSEMBLY COSTS AND TIMES, WHILE ALLOWING TO INCREASE THE NUMBER OF FINISHED PRODUCTS, SATISFYING QUALITY STANDARDS, AND INCORPORATING CORPORATE SOCIAL RESPONSIBILITY VISIONS (CSR). THIS RESEARCH WORK PROPOSES THE IMPLEMENTATION AND CONCEPTUAL VALIDATION OF REAL STUDIES, OF A MANAGEMENT MODEL TO GUARANTEE BETTER LEVELS OF PROCESS PERFORMANCE, IN INDUSTRIAL ASSEMBLY FACILITIES LOCATED IN THE CITY OF CUENCA. THE PROJECT SEEKS TO PROVIDE GUIDELINES FOR MANAGING DECISION MAKING WHERE THERE IS A BALANCE BETWEEN ECONOMIC ASPECTS, QUALITY VARIABLES AND SOCIAL AND ENVIRONMENTAL CRITERIA APPLICABLE TO THE COMPANY IN ITS INFLUENCE ENVIRONMENT. THE APPROACH METHODOLOGY IS BASED ON THE REFERENCE FRAMEWORK OBTAINED FROM THE RESEARCH PROJECT CALLED MANAGEMENT MODEL FOR PROCESS AND COSTS OPTIMIZATION IN THE ASSEMBLY INDUSTRY ", WHICH CONSISTS OF FOUR MAIN PHASES: PLANNING, COLLECTION, ANALYSIS AND PRESENTATION OF DATA AND USES A TIME -BASED COSTING SYSTEM INVESTED BY ACTIVITY (TDABC). THIS PROPOSAL WILL ALSO INCORPORATE, IN ADDITION, INDEXES RELATED TO QUALITY AND CSR. METHODOLOGY, FOR THE VALIDATION OF THE CONCEPTUAL MODEL, THE MODALITY OF THE STUDY OF MULTIPLE CASES WILL BE USED. "