This research was conducted to map the most influenced factors and interests of three pillars of partnership to index the feasibility and suitability assessment model for small island development sites based on the framework of the social -ecological system (SES). The mapping was conducted based on a literature survey, describing connectivity between the SES component and the pillar of collaborative partnership. The SES component consists of resources, users, public infrastructure providers, and public infrastructure, meanwhile, three pillars consist of public, private, and people. SES plays an important role in determining the feasibility and suitability of small island development sites. The component small island becomes the priority factor influenced the most to determine the feasibility and suitability assessment, followed by the user component and related ecosystem component, meanwhile, the component SES of public infrastructure becomes the lowest index. The small island is usually far from the main island and the inhabitants depended on the resources surrounding areas, besides they are intra-depending and supporting each other. Those components were very influential to the component value of the resources and users measured. This mapping would be helpful for many other stakeholders related to the small island development programmers, especially for indexing feasibility and suitability for which island is more eligible to be selected and developed furthermore.