Water supply management organizations at the community level, such as KPSPAM Tirta Kahuripan in Mandalaherang, still manage water usage records, customer fee calculations, and payment reports manually using notebooks and simple spreadsheets. This process creates risks of recording errors, data loss, delayed reporting, and difficulties in tracking customer payment histories. This study aims to analyze the existing business process of water fee payment transactions and identify functional and non-functional requirements for developing a computerized payment transaction information system. The research method used is systems analysis and design through field observations, interviews with administrators, business process analysis, and requirement identification. The proposed system was modeled using Use Case Diagrams, Activity Diagrams, Entity Relationship Diagrams (ERD), and interface mockups. The results indicate that the manual process causes inefficiencies in data management and report preparation. The proposed system involves two main actors, namely the recording operator and treasurer, with different access rights to manage water meter records, payment transactions, and reports. The requirement analysis document is expected to support the future development of a more structured, accurate, and integrated payment transaction information system for KPSPAM.
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