Answer to Question 1
PtD causes designers to think through what workers will actually have to do in constructing the permanent features of a structure. If any aspect of the design creates a hazardous condition the design is altered to eliminate or mitigate the condition.
Answer to Question 2
Heinrich's theory has two central points: 1) Injuries are caused by the action of preceding factors; and 2) removal of the central factor (unsafe act/hazardous condition) negates the action of the preceding factors and, in so doing, prevents accidents and injuries.
turbine design
A child in an orphanage in Juba, Sudan. The treatment of this child is likely to affect his ability ...
Schematic of de novo structure prediction using Rosetta
Bone structure of a flatfish
The structure of a single developed neuron
Age structure for three countries (China)