Risk, a model, framework
                 
locate an interesting topic on risk, a model, framework, some approach to minimizing risk, etc. Here are some pointers that will help critically evaluate some viable topics:
Is the topic attainable for a first-time dissertation student
Is the problem rooted in the literature?
Is the research empirical, i.e., is there a survey, is there an interview guide, has the data been analyzed via some statistical tool?
Is there a theoretical model or framework discussed?
Discuss the topic, the problem the model has been used in the research, and any present findings.