If a hypothesis is tested and upheld several times, it may be possible for the researcher to arrive at generalization, i.e., to build a theory.
As a matter of fact, the real value of research lies in its ability to arrive at certain generalizations.
If the researcher had no hypothesis to start with, he might seek to explain his findings on the basis of some theory.
It is known as interpretation. The process of interpretation may quite often trigger off new questions which in turn may lead to further researches.