The company I work for is studying the convenience of outsourcing all the information systems platform. Given the type of bussiness (broker/dealer/trader and value management) it has found that the best technical proposal so far in too costly, given the model proposed by the outsourcing provider: a fixed cost for instalation of each application; a fixed cost for the maintenance of each application; a fix cost per client of the firm and a variable unit cost per transaction or operation; the company is doubling each year the number of transactions. We would like to respond with a cost model that they can see as a win/win alternative, but that we can control, given that the better use of the platform does not mean more requirements for them. I have come up with one alternative, but would like to have a brainstorm of them. I would appreciate any ideas.