Seven Day Establishment 5.1.16 Given the nature of the DCS' work it was impractical and costly for it to operate on a five-day work week, relying on skeleton staff at weekends and on public holidays. The implementation of the Seven Day Establishment in 2007 (7DE) was intended to ensure that the DCS would be able to guarantee delivery of services to inmates at all times. The DCS' severe challenges as far as determining suitable shift systems that could address centres' specific needs, has proven a major stumbling block. The challenges have resulted in shortcomings of both security and service delivery.