hazard control fault tree analysis

1. Construct a fault tree with the following assumptions. 2. Compute the probability of worker exposure to caught by/ caught between hazard. Problem Statement: The HMD is a drop tower style ride that uses gravity to create freefall. The HMD carries 6 passengers and drops 110 feet into a shaft in the ground. Operators are responsible for fastening and checking two separate seatbelts for each passenger prior to dispatching the ride. Failure for a passenger to be secured could result in serious injury or fatality Passenger Exposure to Unsecured Seat-Belt During Ride if Any of the Following True: 1.SB1 - Dumb Seat-Belt Fails. This can be caused by passenger sitting upon it (0.1): and Operator 1 failing to connect and tighten SB against passenger lap (0.01): and Operator 2 not visually cdnfirming SB secured (0.01). 2.SB2 - Smart Seat-Belt Not Deployed. This can be caused by passenger sitting upon it (0.1), and Operator 1 faling to connect and tighten SB against passenger lap (0.01); and Operator 2 not visually confirming SB secured (0.01). 3.Program Logic Control Fails: Safety interlocks fail, allowing ride to initiate without cycling (pin being removed and reinserted into connecting block (.000001)