There are basically three types of researches.
1. exploratory research:- a type of research in which we don't know the problem as well as solution we have to get all the information about problem first in which we go for SAP analysis and E-TOP analysis.
2. descriptive research:- A type of research in which we well known about problem but do not have knowledge about solution this research we do for solution.
3. Experimental research:- Experimental research in which we have knowledge about problem and solution also but we get alternative solution.