Authors - Jatmiko Yogopriyatno, Nursanty, Yorry Hardayani Abstract - Ambiguity in public decision-making constitutes a structural impediment to effective e-governance, manifesting as procedural uncertainty, inconsistent treatment of analogous cases, and unclear authority allocation. This study examines the Integrated Aspiration and Minutes Management Information System (SMART MURA) developed by the Regional Legislative Council (DPRD) of Musi Rawas Regency, Indonesia, as a sociotechnical solution for resolving decision ambiguity through stakeholder consensus-based participatory design. Employing design science research (DSR) methodology, the study analyses the SMART MURA User Guide as a social contract encoding collective stakeholder agreements generated through multi-stakeholder Focus Group Discussions involving five organisational levels. Three ambiguity-resolution mechanisms are identified: (1) bounded automation for standardising routine administrative processes, (2) explicit judgment points for clarifying the locus of professional discretion, and (3) flexible categorisation that accommodates case complexity without sacrificing treatment consistency. These mechanisms produce four interdependent governance benefits: procedural certainty for citizens, cross-case treatment consistency, traceable accountability through digital audit trails, and operational efficiency. The system further demonstrates structural adaptability to regulatory change and incorporates a tiered data governance architecture that balances operational transparency with individual privacy protection. The study advances e-governance theory by proposing a Transparent Discretionary Space Structuring (TDSS) framework that transcends the binary opposition between rigid Standardization and unstructured discretion. Keywords: E-Governance, Public Decision Ambiguity, Design Science Research, Digital Discretion, Participatory Design, Legislative Information System, Data Governance.