The type of research that serves as a guide for the formulation of hypotheses and/or for the operationalisation of the concepts is known as a feasibility study.
The process of converting concepts into their empirical referents or of quantifying concepts for the purpose of measuring is called triangulation.
The known and observable concepts, which serve as a means to understand and describe other unobservable concepts, are called indicators.
Quantitative researchers employ triangulation, qualitative researchers do not.
Operationalisation is only a tool of quantitative research.
The notion that a concept is identical with its empirical equivalents is known as operationalism.
The expectation that indicators should have the capacity to measure all aspects of the concept adequately, with each one addressing one dimension only is the rule of empirical relevance.
The expectation that indicators should correspond fully with the concept, and only one concept, and should be exhaustive and mutually exclusive is the rule of correspondence.
The expectation that indicators and concepts should be quantified in a uniform manner is the rule of quantification.
The practice of employing several research tools within the same research design is known as triangulation.