The main concept of Total Quality Management (TQM) is: O products should be examined at the input stage to ensure no defects. sure products are 100% fault free. O make sure company has the best quality in its product. O continuous improvement to exceed customers' expectation. Business process re-engineering (BPR) is O to ensure costs are under control. O an exercise that is usually carried out by operational management. O a fundamental change of business processes to order to achieve drastic results changing the procedures of handling raw materials.