2. a. List two problems and two applications each for the following software process models. i. Waterfall model ii. Evolutionary development [4 marks each] b. System requirements ALWAYS evolve in the course of a project so process iteration where earlier stages are reworked is always part of the process for large systems. Explain two approaches that can be used to introduce iteration in a generic process model. [4 marks each] c. Software design is usually documented as a set of graphical models. List four of these graphical models. [1 mark each] 3. a. What is feasibility study and why do we need it in a software development process? [5 marks] b. List and explain the processes in a software risk management [5 marks] c. Explain briefly Information Technology Infrastructure Library ITIL. [4 marks) d. List any six components of ITIL Feasibility Report. [6 marks] 15 days 14/7/03 MI 15 days T3 19 8 days 4/8/03 5 days TO 25/7/03 M3 2 5/8/03 M6 4/7/03 M4 start 15 days T2 20 days 17 7 days 1 11/8/03 10 days 25/7/03 M2 10 days TS M7 T4 5/9/03 15 days M8 TIO 10days T12 18/7/03 M5 25 days T8 Finish 19/9/03 3c. Calculate the critical path and explain what it means. [4 marks]