A computer implemented method, data processing system, and computer usable code are provided for using read-only process components to model service processes. User input is received indicating an attempt to establish a connection from a selected read-only process component to a previously selected read-only process component. Responsive to receiving the user input, verification is performed as to whether the connection is a valid connection. In response to all connections being valid, a service model is built using the set of read-only process components and executable code is generated for the service process based on the service model.