This unit describes the skills required to acquire data related to time in a proof and experimental environment. Explosive ordnance proof tests are conducted to ensure weapons systems or explosive ordnance, in service with Defence, meet the required standards. The acquisition of data related to time is a common component of proof tests.This unit was developed for personnel involved in a physical science or engineering environment where products undergo testing to establish that they meet established standards and/or specifications in respect to time, but is applicable to any individual in this field of work.The skills and knowledge described in this unit must be applied within the legislative, regulatory and policy environment in which they are carried out. Organisational policies and procedures must be consulted and adhered to.Those undertaking this unit must demonstrate the ability to work independently and as part of a team under direct and/or indirect supervision, use discretion and judgement, and take responsibility for the quality of their output. They would perform complex tasks in a range of known contexts.No licensing, legislative or certification requirements apply to unit at the time of publication.