Prior to the introduction of the process-oriented approach, clinical neuropsychological assessment followed a fixed-battery global-achievement approach, and stressed quantitative interpretation of test results (for example the Halstead-Reitan battery). The process-oriented approach offered advances in test interpretation, stressing the qualitative aspects of patients' performance profiles. The Boston Process Approach examines the qualitative process by which the patient solves a problem rather than simply looking at the patient's quantitative numerical scores. The Boston Process also tailors which tests to give a patient instead of administering an entire test battery to every subject, regardless of their condition. This alternative approach improved clinical understanding of brain functions and generated discussion about diagnostic issues in clinical neuropsychology.