The risk of injury or harm for people who work alone may be increased because of difficulty in getting help if required. Persons who work alone, after hours or in isolated circumstances may be exposed to risks because the nature, time, location of the work or remoteness from other persons or support services. Each of these cases pose new, specific risks which otherwise are reduced during normal working hours, e.g. reduced ability for the provision of immediate assistance. The purpose is to ensure a system is in place to adequately respond to an emergency if the need arises.