This research builds upon our previous research by extending a risk-indexing model to an adaptive indexing model, taking into account several additional factors. The new adaptive risk model includes the analysis of varying levels of contributions among firms, different consequences of the sub-product groups, the effects of learning over time, the effects of economic change over time, and the effects of multiple product lines. The research concludes with the rationale for the inclusion of these factors and the development of the adaptive risk model. [ABSTRAC