TOPIC 2 - Requirement Analysis and Modeling

Systems development or applications development

is a systematic process of defining, designing, testing, and implementing a new application.

planning

analysis

design

implementation

Four fundamental phases common to all software development projects

systems analysts or requirements engineer

In the analysis phase, all projects require this.

systems analyst

The role of this is to gather requirements, analyze the gathered requirements, model the user needs, and create blueprints for how the system should be built.

requirements definition report

The purpose of requirements determination is to convert the high-level requirements defined from user requirements into a list of detailed requirements, called, _____________, that can be used as inputs for creating models such as functional model.

Requirement

is simply a statement of what the system must perform or what characteristic it must have.

requirement

are determined from discussions with the and determine their actual needs.

During Analysis

This phase is where requirements are written from the perspective of the needs of the user.

Design Phase

In this phase, the user requirements will be used to describe how the system will be implemented.

Requirements

This can be functional or non-functional

Functional Requirements

These are requirements are directly related to the process a system has to perform or data it needs to contain.

• Functional

• structural

• behavioral models

are graphical representations that show how a system or software works.

Non-functional requirements

These requirements pertain to behavioral properties that a system must have, including operational, performance, security, and cultural and political.

Non-functional requirements

These requirements define how a system or software is supposed to be or its system properties.