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This study provides system analysis and design for an android-based online group-buying system. The proposed system is specially designed for small location-related consumer groups. To explain the requirement analysis, business processes, and software structure, three types of UML diagrams are utilized in this study including use case diagrams, activity diagrams and class diagrams. The proposed system is suitable for the consumers living in rural areas with inconvenient living facilities to group-buy their meals.
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