<![CDATA[The utilization of Geographic Information Systems (GIS) in mapping investment opportunities has become a strategic solution to support location-based decision-making in South Lampung Regency. However, the effectiveness of such systems needs to be evaluated to ensure that all functionalities operate according to user requirements. This study aims to evaluate the performance of a GIS-based Investment Opportunity Information System using the Black Box Testing method. The testing process involved developers, administrators, and eight users from regional government organizations (OPD) to evaluate various system modules, including registration, login, GIS mapping, data visualization, and reporting. The results indicate that all system functions operate as expected and produce outputs consistent with the given inputs. Nevertheless, minor issues were identified in the graphical visualization display on certain devices. This study contributes to ensuring the functional quality of the system and provides recommendations for further system improvement]]>
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