Is the problem of current interest?
Is it practically possible to undertake the study?
Do you have access to the sample population?
Will the organisation under study give you written permission to conduct the study?
Is it possible to apply the results in practice?
Can you find answers to the problem through research?
Will you be able to handle the research problem?
Is there enough scope left within the field of research?
Is the study free of any ethical problems and limitations?
Are you motivated to undertake the research?
Is the research viable in your current work situation?
Do you have enough time, motivation and energy to complete the project?

If your answer to one of these questions is no, then your search for a topic continues.