Travel to work area legal status. However, they give planners and geographers an alternate view of urban life as their boundaries are tied not to arbitrary administrative limits but socio-economic ties. Having an idea of where people commute from for work is particularly useful for public transport planning. Travel to Work Areas are defined by the Office for National Statistics using census data for commuting between wards, based on the different locations of individuals' home and work addresses. A Travel to Work Area is a collection of wards for which "of the resident economically active population, at least 75% actually work in the area,
Social work which involves working directly with individuals or small groups; and macro-work, which involves working communities, and within social policy, to create change on a larger scale. Social work developed in the 19th century, with roots in voluntary philanthropy and grassroots organizing. However, the act of responding to social needs have existed long before then, primarily from private charities, and religious organizations. The effects of the Industrial Revolution and the Great Depression placed pressure on social work to become a more defined discipline. Social work is a broad profession that intersects with several disciplines. Social work organizations offer the following definitions: