structural:scholar_edition
Inmate security classifications

Generally, when an inmate arrives at a prison, they go through a security classification screening and risk assessment that determines where they will be placed within the prison system. Classifications are assigned by assessing the prisoner's personal history and criminal record, and through subjective determinations made by intake personnel (which include mental health workers, counselors, clerical staff, sheriff deputies, prison unit managers, and others). This process will have a major impact on the prisoner's experience, determining their security level, educational and work programs, mental health status (e.g. the determination of whether they will be placed in a mental health unit), and many other factors. This sorting of prisoners is one of the fundamental techniques through which the prison administration maintains control over the inmate population and attempts to reduce risks and liabilities in an attempt to create an orderly and secure prison environment. At some prisons, prisoners are made to wear a prison uniform.

The levels of security within a prison system are categorized differently around the world, but tend to follow a distinct pattern. At one end of the spectrum are the most secure facilities ("maximum security"), which typically hold prisoners that are considered dangerous, disruptive or likely to try to escape. Furthermore, in recent times, supermax prisons have been created where the custody level goes beyond maximum security for people such as terrorists or political prisoners deemed a threat to national security, and inmates from other prisons who have a history of violent or other disruptive behavior in prison or are suspected of gang affiliation. These inmates have individual cells and are kept in lockdown, often for more than 23 hours per day. Meals are served through "chuck-holes" in the cell door, and each inmate is allowed one hour of outdoor exercise per day, alone. They are normally permitted no contact with other inmates and are under constant surveillance via closed-circuit television cameras.

On the other end are "minimum security" prisons which are most often used to house those for whom more stringent security is deemed unnecessary. For example, prisoners convicted of white-collar crime (which rarely results in incarceration) are almost always sent to minimum-security prisons due to them having committed nonviolent crimes. Lower-security prisons are often designed with less restrictive features, confining prisoners at night in smaller locked dormitories or even cottage or cabin-like housing while permitting them free movement around the grounds to work or partake in activities during the day. Some countries (such as Great Britain) also have "open" prisons where prisoners are allowed home-leave or part-time employment outside of the prison. Suomenlinna Island facility in Finland is an example of one such "open" correctional facility. The prison has been open since 1971 and, as of September 2013, the facility's 95 male prisoners leave the prison grounds on a daily basis to work in the corresponding township or commute to the mainland for either work or study. Prisoners can rent flat-screen televisions, sound systems, and mini-refrigerators with the prison-labor wages that they can earn—wages range between 4.10 and €7.30 per hour. With electronic monitoring, prisoners are also allowed to visit their families in Helsinki and eat together with the prison staff. Prisoners in Scandinavian facilities are permitted to wear their own clothes.

There are fundamental differences between the security level of men's prisons and that of women's prisons. Male prisons tend to have higher, or more severe, security levels/classifications than female prisons. This is even noticeable when comparing the construction and design of male prisons which tend to have very tall walls and towers, barbed wire and other serious security measures whereas these types of high level security measures are absent at many female prisons. This is due to multiple factors including females being convicted of less severe offences, and being less likely to be convicted of violent offences, in comparison to males, and due to female prisoners being less likely to be violent than male prisoners.