There are various methods for developing information system, but the most popular alternatives are Structured Analysis,  and and Object-orientated-analysis (O-O).

Structured analysis is a traditional system development techniques that is time -tested and easy to understand. This methods uses a series of phases  called system development life cyclo (SDLC), to plant analyze, design,implement and support an information system. This methods  is focus in on processes that transform data  into useful information, in this methods  data and processes are treats as separated components. The  SDLC  Model usually includes five steps: System Planning, system Analysis, system design, system implementation, and system operation, support and security.

Object Orientated Analysis,  This methods combine data and the processes that act on the data into things called objects.  Object orientated is use to model real world business processes and operations. The result is a set software objects that represent actual people, things, transactions, and events; using a programing language a programmer then writes the code that creates the objects. 

The bottom line is that the system analyst should understand the pros and cons of any approach before selecting a development method for a specific project.

The important of project management Regardless of the development strategy, people,task,timetable ans expenses must be managed effectively,  Project Management, is the process of planning, scheduling, monitoring, controlling, and reporting upon the development of an information system.