Safety relevant data are recorded objectively
at any time in the PCMS safety database. In particular, behavioral
data of on-site workers are collected from the PCMS. The
PCMS can record how on-site workers behave when the PCMS system
detects their exposure to one of the above-mentioned three
dangers, such as the area of a moving tower crane’s hook, a moving
excavator, or the edge of a height. Examples of unsafe behaviors
include, but are not limited to, ignoring warning signals and moving
toward sources of danger rather than avoiding them. With
respect to safe behaviors, if a worker maintains a safe distance (-
more than three meters) from the danger zone after three warnings,
this is recorded as safe behavior.