During the research, I have found that many sources have their own limitations and biases which affect the quality of the data provided. It is then crucial to choose the relatively more reliable and objective sources and compare them. I also realised that my focus on only consumer demand is too restrictive. It only shows the impact of the policy on MRT commuters. I then discussed with my supervisor and decided to refine my research question to include more aspects of the impact. I restructured my plan to integrate the impact of the discount on MRT pricing on the Singapore society and government. I learned that during the preparation to write an essay, the original research question may find to be too narrow or not accurate enough to summarise the real intention of the research. Refinement of the research question is then necessary and should not be ignored. (148)