9. Develop an inspection technique for fault trees that would allow you to have increased confidence that the fault tree was accurate and complete. Carefully consider the engineering disciplines that should be involved, the checklists that might be used, and the inspection process that might be followed.
10. The failures of the Therac 25 might have been prevented if the system were designed to include defense in depth. Examine the details of the Therac 25 sys- tem and explain how defense in depth was present in earlier Therac designs but eliminated in the Therac 25.