Rank consistency of TOPSIS in mobile based recommendation system

The Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) algorithm was chosen as an algorithm for making recommendations in many mobile recommender system application, such as in mobile-based sports venue recommendation system. In the previous work, usability testing was conducted to test the user acceptance of the application, but the reliability of TOPSIS hasn't been tested yet. The accuracy testing is very subjective for problems in terms of sports venue recommendations, therefore, this research proposed rank consistency testing to find out if there is a rank reversal (the first ranking is swapped with the latest ranking) when there is a change in the number of alternatives (alternatives in this case are the sports venues). The contribution of this research is to find out the reliability of the TOPSIS algorithm in the issue of mobile-based sports venue recommendation system. The test scenario is held by adding one alternative with the same value as one of the existing alternatives. Based on the results of tests for this case, the rank consistency result shows 100% of rank consistency and there is also no rank reversal.