The diagnosis of personality disorders was formally presented in the first edition of Diagnostic and Statistical Manual of Mental Disorders (DSM-1). DSM-3 proposed a systematic framework for understanding personality disorders, and mentioned the multi-axis diagnosis strategy and category diagnosis criteria. The following editions of DSM still mentioned the strategy and criteria. DSM-5, published in 2013, mentioned the alternative model for personality disorders (AMPD), which indicated a new direction in the diagnosis and assessment of personality disorders. AMPD had a dimensional assessment of the severity of personality pathology (criterion A), and a dimensional assessment of features of personality pathology (criterion B). The criterion A was influenced by the concepts of psychodynamics, like the distinction and integration of self and object in the Kernberg model of personality organization. Level of Personality Functioning Scale (LPFS) and Personality Inventory for DSM-5 were developed to assess personality disorders mentioned in AMPD. The reliability and validity of the tools were demonstrated. Structured Interview of Personality Organization, an assessment tool based on Kernberg model of personality organization, was proved to have significant correlation with LPFS.