Life Cycle Models

Edu Level: Unit2

Date: Jul 16, 2024

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The software development life cycle produces software with the highest quality in the most efficient way, shortest time and lowest cost.

There are five stages of the SDLC:
Planning and Requirement Analysis

This is to identify the scope of the project, determine the feasibility and plan for the required resources
Defining Requirements

The scope of work necessary to define, analyze and document business and end-user requirements.

Designing the Product Architecture

Developers must devise a design approach for the software architecture that will undergird the product's functionality
Developing the product

Building the system, integrating and testing the units into larger components and providing a technical environment for the system.
Testing the product

Evaluating the system or its components with the intent to find whether it meets the requirements or not.

Life cycle Models:
Waterfall

Tasks are performed sequentially

ADVANTAGES	DISADVANTAGES
Reliable and Predictable	Unsuitable for Projects with changing requirements
	Defining all requirements at the start of the project
	High risk and uncertainty

System is developed in increments so that it can be readily modified in response to end-user and customer feedback.

ADVANTAGES	DISADVANTAGES
Risk analysis	Not suitable for smaller projects
Initial Operating time is less	Costly

Reuse-oriented

ADVANTAGES	DISADVANTAGES
Reduced Cost	Not always worked as a practice in its true form
Low risk factor	Compromises In requirements may not meet the needs of user

ADVANTAGES	DISADVANTAGES
Flexible	Uncertainty
Low risk factor	Lack of predictability