Although a marketing information system primarily serves the company's marketing and other managers, it might also provide information to external partners, such as suppliers, resellers, or marketing services agencies. an example of how the mis can provide customer information to partners beyond the firm is

Four key marketing decision variables are price (p), advertising (a), transportation (t), and product quality (q). consumer demand (d) is influenced by these variables. the simplest model for describing demand in terms of these variables is: d = k – pp + aa + tt + qq where k, p, a, t, and q are constants. discuss the assumptions of this model. specifically, how does each variable affect demand? how do the variables influence each other? what limitations might this model have? how can it be improved?