Recent discussions raised by the BPM community illustrate the increasing demand of practitioners in the solutions for descriptive, knowledge-intensive processes. As a matter of fact, a majority of modeling formalisms presented on the market today fails in providing an appropriate level of adaptability while ensuring validation and control for such processes. In this work we present a modeling approach based on Declarative Configurable specifications that capture the processes at three abstraction levels: design, deployment, and execution. As a result, DeCo allows for separation of the process goals from the process means and, finally, from the process realization details improving adaptability and control.