Assignment 2 Table 1 Possible marks Student Name Marking guide Awarded mark Comment 100 Total assignment 20 IO Map 5 Appropriately defined system and purpose statement 5 Determine the critical success factors 5 Determine the key necessary conditions 5 Logical links and format 40 Current Reality Tree 10 Source UDE's validated - Evidence of matching UDE's with IO Map 10 Clarity - entities worded clearly and unambiguous, Symptoms and causes differentiated, links readable in English, relationships between the entities are logically valid (necessary and sufficient) 10 CRT content - CRT includes obvious entities to determine cause of the UDEs 10 Root cause identification- proposed root cause is logically derived 30 Evaporating cloud 10 Logical 'necessary' relationships between all entities (A-B, B-D, A-C, C-D', D-D') 10 Compromise exists between B-D' and C-D) 10 Key 'Because' assumptions between entities are defined and considered 10 False assumptions/Injections 10 One (or a few) assumption/s is/are selected for invalidation, Rationale for invalidation is legitimate, Proposed injection appears to neutralise (evaporate) the conflict