with the introduction of distributed communication systems, a new need for an effective hazarc identification methodology has emerged. A number of CHAZOP variations have been suggested since the early 90’s. However, due to a number of reasons they are regarded as insufficient to address potential risks found in distributed communication systems. Some of the most important issues that current aooroaches face include: Table 3. Hardware level — Multidimensional guidance matrix can be further separated into “input-to-machine” interactions and “output-from-machine”. Human - Figure 2: UML Activity Diagram - Corrective Maintenance Scenario Figure 5: Multilevel — Multidimensional HAZOP Results (one-page extract from the report)
