Once a patient and nurse agree on the diagnoses, a plan of action can be developed. If multiple diagnoses need to be addressed, the head nurse will prioritize each assessment and devote attention to severe symptoms and high risk factors. Each problem is assigned a clear, measurable goal for the expected beneficial outcome. For this phase, nurses generally refer to the evidence-based Nursing Outcome Classification, which is a set of standardized terms and measurements for tracking patient wellness. The Nursing Interventions Classification may also be used as a resource for planning.