Thus, the construction industry needs a safety system that is
capable of monitoring and dealing with novel, variable, real-time
risks and hazards. The four basic steps of the BBS approach are
(1) identification, (2) observation, (3) intervention, and (4) review
(or follow-up observation) and monitoring (Ismail et al., 2012).
However, on traditional construction sites, individual observation,
review and monitoring may consume many more hours of safety
management staff time than they do in other settings (such as a
factory) because workers are likely to roam on job sites and therefore
be difficult to identify and track (Zhang and Fang, 2013).