Process-Centered Software Engineering Environments (PSEEs) deal with activities that demand limited resources. Characteristics about required resources and their dynamic availability are used by software process instantiation phase to define process allocation strategies. However, most of existing PSEEs do not allow precise resource specification, and the instantiation is often based on the knowledge of a process designer, mostly without automated support. Thus, process managers must make all major decisions based on their individual insights and experience: this constitutes a major obstacle for resource allocation analysis and optimization in process systems and can influence project management and overall software quality. This paper discusses the proposed Instantiation Policies as a compact formalism to allow user-defined reusable management strategies. Finally, the adopted resource taxonomy is presented as a motivating infrastructure for the comparison of the proposed paradigm to s...