A business process (15) having a number of computer implemented steps using software application components, to enable automatic deployment on computing infrastructure, is modelled by a management system. It automatically derives a grounded model (55) of the business process from an unbound model (25) of the business process, based on an infrastructure design template (35). The unbound model specifies the application components to be used, and the grounded model adds a complete design of the computing infrastructure to be used. The use of an infrastructure design template can reduce the large number of options to be evaluated to help reduce the complexity of generating or changing the grounded model. The infrastructure design template formally relates the business process, application components and infrastructure design so that designs, or changes which are inconsistent or inefficient can be avoided. Thus more automation of the designing and changing the design is feasible.