Explain the billing process,key decision that need to be made ,and threats to that process,and describe the controls that can be used to mitigate those threats

Explain the five phases of the systems development life cycle, and discuss the people involved in systems development and the roles they play. Explain the importance of systems development planning, and describe the types of plans and planning techniques used. Discuss the various types of feasibility analysis, and calculate economic feasibility using capital budgeting techniques