This type of research is also held to take the shape of an improvement in the existing theory by relaxing some of its assumptions or by reinterpreting it or by developing a new theory with the existing one as its basis. Since theory is always based on assumptions, there often exists enormous scope for altering or formulating new set of assumptions and adding new dimensions to the existing theory.
These also exist the possibilities of reinterpretation of the theory that has already been developed. A researcher may, as well take off from the existing theories and come out with a new one of his own. The assumptions of a theory should always be well define and plausible. Relaxing assumptions, altering them or making new ones altogether depends upon how a researcher views the existing theory.