A Cocoso-Based Requirements Prioritization Approach For Travel Bookkeeping Mobile Applications

During international travel, frequent transactions across multiple currencies and spending categories can make timely and accurate expense recording difficult. This study applies the Combined Compromise Solution (CoCoSo) method to prioritize requirements for a travel bookkeeping mobile application. Nineteen candidate consumption accounts were evaluated by 35 travelers, and the eight highest-ranked categories were retained as core system requirements. Food-related and general shopping categories received the highest priorities, indicating the transactions that travelers considered most important for convenient recording. Based on these results, the application was developed with simplified category selection, foreign-exchange conversion, and offline local data storage. System evaluation yielded a System Usability Scale (SUS) score of 74.91, indicating satisfactory perceived usability. Task-based evaluation further confirmed that the developed application could support the main bookkeeping operations of recording, querying, and modifying travel expenses. These findings demonstrate the value of CoCoSo in system requirements analysis and its potential to support user-centered financial technologies in mobile applications. The study also provides insights for developing practical, usable, and context-aware tools that support efficient financial management during travel.