Why do we need to do a Research?

A lot of daily activities we do, are either based on common sense or we do the just because we have to or just because we have been told so. But, sometimes common sense is not enough; we have to apply theories and look for facts hidden behind things and to get into that process we have to ‘research’. Because that might just work in one condition and can fail badly in the others or when combined with some other situations. Common sense approaches may overlook the impact of external factors which may contribute to what is observed. Even in the domain of healthcare, there are gaps in knowledge, theories about how something might work better and ideas for improvement.