All phases work in concert to separate and segregate the inmate population into six inmate classification levels based on in-custody behavior with a custody profile override. Intake assessment separates medically and mentally ill inmates from the main population and segregates assaultive, high-escape-risk, and extreme-protective-custody inmates into high-security housing units. The risk analysis analyzes the inmate's risk to the safety and security of the facility, staff, and inmates. The admissions/orientation component informs the incoming inmates on jail rules, regulations, policy, and procedures. The primary-housing phase reviews all documented classification work, analyzes the admissions/orientation work, and assigns primary housing. The assignment is based on in-custody behavior substantiated by objective custody information and criminal history. Although the BACIS was designed for a direct-supervision facility, it can be adapted to linear facilities. 1 chart.