This is an Accountable, Responsible, Participant, and Advisor Alternative ARPA. It, too, can be applied to a single project or strategic area of the business. The person is responsible for the company's success. This person makes strategic decisions about the project or initiative. One or two people are in charge of day to day execution, ensuring that work is completed within project constraints and to our standards of excellence. These individuals make tactical decisions regarding the project or initiative. People who devote time and resources to project delivery but do not have a primary role or responsibility for the project.