ABC Company is a big company with complex business. There are only some information system modules applied in the company now. The managers find its information systems are far from enough. Therefore, they are planning to build a big information system to support all the other operations. The system is expected to be integrated with the existing information systems and it would need a huge budget. The managers need to choose one system development method for the new information system.

a) What method do you recommend to the managers? (10 marks)

b) Explain why you recommend the above method. (20 marks)

c) Is there any other method? Explain its process and the situation when to adopt this method.