This research aimed to (1) analyze the organizational architecture of the School of Political and Social Sciences, University of Phayao, using the TOGAF Framework, (2) design an Enterprise Blueprint, and (3) evaluate personnel satisfaction with the use of application systems. The study employed a mixed-methods research approach, combining qualitative and quantitative methods. The research area was the School of Political and Social Sciences, University of Phayao.
        The results of the organizational architecture analysis based on the TOGAF Framework, covering four domains—Business, Data, Application, and Technology—revealed that, in the business domain, the organization has a clear management structure and well-defined operational processes; however, limitations were found in terms of workforce and budget. In the data domain, a major issue was that data are stored across multiple systems, resulting in data redundancy and difficulties in holistic data management. In the application domain, although multiple information systems are in use, most operate independently with limited data integration. In contrast, the technology domain indicated that the existing IT infrastructure meets standard requirements and is capable of supporting organizational operations. Based on these findings, an Enterprise Blueprint was developed with a key focus on data centralization and system integration through Application Programming Interface (API) technology. This approach aims to support data exchange between systems, reduce data redundancy, and enhance organizational management efficiency. Regarding user satisfaction, the sample consisted of 33 personnel currently working at the School of Political and Social Sciences, University of Phayao. Data were collected using a five-point Likert-scale questionnaire and analyzed using descriptive statistics. The results indicated that overall satisfaction with the application systems was at a high level ( = 4.12, S.D. = 0.56). The highest mean score was found in system outcomes (= 4.21, S.D. = 0.56), followed by system security (= 4.16, S.D. = 0.58), system design (= 4.10, S.D. = 0.57), and system usability (??? = 4.00, S.D. = 0.51). Open-ended responses were consistent with the limitations identified through the TOGAF analysis, particularly emphasizing the need for inter-departmental data integration and mobile device support to align with the Enterprise Blueprint and support the organization’s digital transformation.
      In conclusion, the organizational architecture analysis and design based on the TOGAF Framework presented in this study can serve as a strategic guideline for information system development, reducing data redundancy, and supporting digital management of the School of Political and Social Sciences, University of Phayao. Furthermore, the proposed framework can be applied as a model for information system development in other units within the university.