This Standard has been prepared to support Human Factors Integration (HFI) into the engineering design process within the Australian Rail Industry.This standard describes the requirements for organisations conducting or procuring engineering design activities, services or products to;- incorporate Human Factors within their engineering design processes,- ensure their products comply with the generic Human Factors requirements set out in this standard, and- use the HFI process to identify the specific Human Factors requirements of the system or asset being designed, procured or modified.This standard provides the requirements for Human Factors Integration (HFI) within the following activities:- Design or procurement of new or altered systems and assets to the rail industry. This includes any design changes to an asset throughout its lifecycle.- Assurance of the suitability of like-for-like replacement of systems or assets within the rail industry in order to avoid promulgation of inefficiencies and error.- Application of WHS Safe Design requirements.