To ensure that your research project is manageable, you must be sure that your topic is

Suitable for the research assignment.

decide on if it has been assigned or do I have to develop it?

Understand the scope of the project

make sure it is not too broad and narrow enough that it can be fully covered

how will the audience relate to it, and do you feel strongly about it?

There also must be plenty of reference material available.

Narrow enough to be presented thoroughly.