Answer:
Typical roles decision support systems (DSS) play in business modeling are around advocating a certain thought around decision making use of the underlying data. For example : identifying from the underlying data who are the most profitable customers, what products are selling well in a certain market etc ...for organizations DSS could help in cost management as well (where is money getting spent for what) .. it could help in defining marketing strategy, it could help is supply chain management and pretty much in the whole ecosystem of the organization.