The purpose of the system investigation phase is to a. define what the information system must do to solve the problem or capitalize on the opportunity b. gain a clear understanding of the specifics of the problem to solve or the opportunity to address C. gather data on the existing system and determine the requirements for the new system d. identify, confirm, and prioritize system requirements 8. is a diagram used to document the processes of the current system or to provide a model of a proposed new system. 9. The overall emphasis of the phase is on gathering data on the existing system, determining the requirements of the new system. considering alternatives within identified constraints, and investigating the feasibility of alternative solutions. a investigation b. analysis d. corstruction