Qualitative research method with case study model by Yin (2018). 1. Plan (Doing research planning): carried out to estimate the time, cost, and suitability of the research topic. 2. Design (Creating a research design): determine the model and steps to be carried out in the research. 3. Prepare: prepare instruments and other equipment according to research needs. At the same time, validation tests are carried out to competent parties (share). 4. Collect (collection of data): collect data according to the research plan as well as design a collection model. 5. Analyze (perform data analysis: the steps taken are data reduction, data display, and conclusions. 6. Share (make a research report).