VDU /DSE WORKSTATION ASSESSOR TRAINING If a person habitually uses a visual display unit (VDU) also referred to as DSE Display Screen Equipment as a significant part of their daily routine i.e. they have to use a computer continuously for more than one hour per day, and it is a daily activity, a workstation assessment must be completed to help ensure that the requirements of Chapter 50f The Safety, Health and Welfare at Work (General Application) Regulations 2007 can be complied with.