Despite the multitude of impact measurement techniques available to heritage site managers there is a case for the bigger strategic picture to figure more strongly in impact measurement decision making for ICT and 3D applications in the heritage sector. Discussions with heritage mangers raised the need for a holistic practical social impact model, one which combines impact measurement with overall strategic decision making considerations, accommodating internal and external dimensions of impact, as well as mission (and vision) and stakeholder perspectives; and one that embeds impact as a dynamic issue for management in heritage organisations. The 3D-ISF approach is broadly divided into two complementary elements. The left side of the framework considers the strategic perspective of the organization, while the right side encapsulates the impact measurement. The two elements combine to form a holistic vision of the interaction between the site strategy, 3D deployment and its relationship...