E-commerce development is described in literature with reference to divergent points of views having many insufficiencies. In order to palliate these limits, this paper proposes a new construct, namely floors, corresponding to growing development levels. This construct permits e-commerce development influencing factors analysis. This paper proposes a model specifying factors influencing e-commerce development in Tunisian hospitality sector. A technology-organization-environment model was adopted to model the variables shaping development. Variables maintained in the model are affected to development floors.