Traditional Methodologies

Information Systems

ASSIGNMENT – SYSTEM DEVELOPMENT LIFE CYCLE

2/2/2012

Methodology

Methodology is a standardized documented set of activities used to manage a system development project. It is a structured plan if control that processes the development if information systems.

Types of methodologies

Structured Designs

Structured designs are a step-by-step approach which moves logically from one phase to the next, having approval before continuation. The precise layout of this method forces the developers to classify and understand the system requirements beforehand.

Object oriented designs

Object oriented designs are based on the lack of coordination between process- centred and data-centred approaches in System Development Life Cycle. Object Oriented breaks down problems into objects. Objects are considered part of the system that contains both process which are known as “behaviours” of the object and data. Object oriented uses UML(Unified Modelling Language), which id a standard diagramming and modelling technique.

Waterfall Model

Waterfall model is a structure design. It is the earliest method of structured system development where each developer in the team works on different phases; that is starting at Requirements and on completion of this phase passed to the other which is the Requirement Analysis phase and so forth in a sequential manner. It is used on small projects because it eliminated testing to identify problems early in process. Emphasis is on planning, time schedules, target dates, budgets and implementation of the entire system at one time. Control over this large process is maintained by extensive written documentation and usually an approval of the user and some type of manager at the end if most phases before the start of the next phase. In recent years, the Waterfall model has been under attack for being too rigid and unrealistic when it comes to quick...