Management by facts: The common ground between total quality management and evidence-based management

It is widely agreed that, whenever possible, managers should base their decisions on scientific knowledge rather than gut feelings or intuitions. There are two main sources of scientific knowledge available to managers: external and internal. External knowledge comes from studies conducted outside the company and it is mainly generated by researchers at universities and business schools; a recent trend, under the name of evidence-based management, tries to potentiate it, despite the fact that as a source of scientific knowledge for management, it has two problems: it is difficult to generate and it is problematic to disseminate among managers. On the other hand, internal knowledge comes from studies conducted on the company's process on which decisions have to be made and by the very same managers that have to make them. The paper argues that this kind of knowledge is easier to generate and use and thus that it has to be potentiated as the main source for scientific decisions; the idea is not new as it is one of the pillars of total quality management and there are methods and techniques of proved efficiency to put it into practice.