A SR model allows modeling of the reasons associated with each actor and their dependencies, and provides information about how actors achieve their goals and soft goals. This model includes only elements considered as important enough to impact the results of a goal.
The SR model shows the dependences of the actors by including the SD model. Relating to these dependences, the SR model specifies goals, soft goals, tasks and resources. Compared with SD models, SR models provide a more detailed level of modelling by looking inside actors to model internal, intentional relationships. Intentional elements (goals, soft goals, tasks, resources) appear in the SR model not only as external dependencies, but also as internal elements linked by means-ends relationships and task-decompositions. The means-end links provide understanding about why an actor would engage in some tasks, pursue a goal, need a resource, or want a soft goal; the task-decomposition links provide a hierarchical description of intentional elements that make up a routine. Such a model is used to describe stakeholder interests and concerns, and how they might be addressed by different configurations of systems and environments.