Developing a good research question is one of the first critical steps in the research process. A well written research question will guide the research project and assist in the construction of a logical argument.
An example of well written research question with at least three supporting details/factors could be:
"What are the effects of intervention programs in the elementary schools on the rate of childhood obesity among 3rd - 6th grade students?"
It can be seen here several factors that will guide the research without making it too narrow, defining exactly what, where and who should be studied.