External factors that may impact outcomes in the selected sector need to be taken into consideration during the case-study design phase. For instance, in the hotel study, substantial variation in revenues that were potentially due to a high-profile tourist event and the timing of Ramadan limited the evaluation’s ability to derive conclusions with confidence about the changes in hotel revenues. This difficulty may be hard to overcome so MCC should be aware that it might be challenging to estimate changes in certain outcomes, such as revenue, in situations like this.
Lesson Learned