Abstract: Methods, including service methods, articles of manufacture, systems, articles and programmable devices are provided for calibrating and customizing an estimation model as a function of a service-oriented architecture environment. A programmable calibration engine device configured by a logic component generates a service-oriented architecture solution effort estimate as a function of a business available resource input and a required business functionality input. Some methods also include managing a calibration constraint, a policy, an end-user access control, an output scope and an output format and providing a programmable effort estimation engine, providing a set of a predefined constraint, a boundary value and historical calibration data to the effort estimation engine, and generating a service-oriented architecture solution effort estimate as a function of the provided set, the policy and an input of a solution parameter within the scope of a service-oriented architecture transformation.