The objective of this clinical trial is to evaluate the safety and efficacy of olanzapine titration schedule in patients with schizophrenia

Inclusion Criteria:

• Of patients with schizophrenia in accordance with DSM(Diagnostic and Statistical Manual of Mental Disorders)-5 diagnostic criteria, who are judged that administration of low dose is more appropriate than initial recommended dose or standard titration dose of olanzapine to consider medical conditions by investigator
• Patients with the duration of schizophrenia for more than 1 year at screening visit(Visit 1)

Exclusion Criteria:

• Patients diagnosed schizophrenia spectrum and other psychotic disorder(e.g. schizoaffective disorder, etc.), bipolar disorder, depressive disorder, etc., in accordance with DSM(Diagnostic and Statistical Manual of Mental Disorders)-5 diagnostic criteria at screening visit(Visit 1)
• Patients with a history of hospitalization for worsening schizophrenia within 12 weeks at screening visit(Visit 1)