Which phase describes the event as it happens in the domino theory?

• A. Contact phase
• B. Pre-Contact phase
• C. Post-Contact phase
• D. After-event phase

Answer: (A)

In the domino theory, an accident unfolds as a sequence of events that lead from conditions to consequence. The moment the hazard and the worker interact—the instant of contact—is the actual event that initiates the accident. That moment is what we call the contact phase. Before that, conditions and behaviors exist (pre-contact), and after that moment, the results unfold as post-contact or after-event phases. So describing the event as it happens points to the contact phase—the moment when the hazard and the person meet and the accident begins.