Before revision: There are two types of static hazards: Static-1 Hazard: the output is currently 1 and after the inputs change, the output momentarily changes to 0,1 before settling on 1 Static-0 Hazard: the output is currently 0 and after the inputs change, the output momentarily changes to 1,0 before settling on 0 In properly formed two-level AND-OR logic based on a Sum Of Products expression, there will be no static-0 hazards .
After revision: (but may still have static-1 hazards)There are two types of static hazards: Static-1 Hazard: the output is currently 1 and after the inputs change, the output momentarily changes to 0,1 before settling on 1 Static-0 Hazard: the output is currently 0 and after the inputs change, the output momentarily changes to 1,0 before settling on 0 In properly formed two-level AND-OR logic based on a Sum Of Products expression, there will be no static-0 hazards .