rad model & prototyping of software engineering

SOFTWARE ENGINEERING

ASIF IDRISI18018RAKESH PENTA18027

TOPIC

RAD MODEL&

PROTOTYPING

RAD MODEL

WHAT IS RAD ???

RAD model is Rapid Application Development model.

It is a type of Incremental model.

In RAD the Components are developed in parallel Manner.

It is a faster software development process.

RAD MODEL

PHASES IN RAD

Requirements Planning phase

User design phase

Construction phase 

Cutover phase

RAD MODEL

1. Requirements Planning phase

Users, managers, and IT staff members discuss on Business needs.

They discuss on System requirements.

They also discuss on Project scope

It decide who will generate software.

It tells what software will do.

2. User design phase

RAD MODEL

It is also called as Modeling phase.

User Design phase is a continuous interactive process.

During this phase, users interact with software model. It allows users to understand, modify the System.

It approve a working model of the system that meets their needs.

RAD MODEL

3. Construction phase

Focuses on program and application development task.

Tasks are * Programming and application development, * Coding, * Unit-integration and * System testing.

RAD MODEL

4. Cutover phase

It is the final ( Phase ) tasks in the System Development Life Cycle (SDLC).

Its tasks are * Data conversion, * Full-scale testing, * System change over, * User training.

In this phase the new system is built, and delivered.

RAD MODEL

Diagram

RAD MODEL

Advantages

RAD reduces the development time.

Increases reusability of components.

Greater Customer Satisfaction.

Faster Delivery Time.

Simple and Better Quality.

RAD MODEL

Disadvantages

Requires highly skilled developers/designers.

RAD is not appropriate when technical risk are high.

Cant use for small projects.

Absence of reusable component can lead to failure of the project.

PROTOTYPING

PROTOTYPING

A prototype is the sample implementation of the real system.

A prototype is a toy implementation of the system.

It shows limited and main functional capabilities of the proposed system.

The customer provides suggestion and improvements on the prototype.

A prototype is a model or a program which is not based on strict planning.

PROTOTYPING

After a prototype is built, it is delivered to the customer for the evaluation.

It helps the customer determine how the feature will function in the final software.

It is a very useful technique to obtain accurate requirements of the system.

PROTOTYPING

TYPES OF PROTOTYPE

1 Throwaway prototypes

2 Evolutionary Prototypes

PROTOTYPING

Throwaway Prototypes

 Prototype developed as part of a throw-away approach.

It will not form part of the final solution.

It is a useful way of exploring ideas, and gaining feedback from user.

PROTOTYPING

Evolutionary Prototypes

It is initial prototype is presented to user.

They Provide feedback and suggestion for improvement.

Each stage of this prototype evolves toward the final system hence it is called as Evolutionary Prototype

PROTOTYPING

Diagram

PROTOTYPINGAdvantage

Users are actively involved in the development.

Errors can be detected much earlier.

Missing functionality can be identified easily.

It reduces risk of failure.

PROTOTYPING

Disadvantage

It is a slow process.

It is not complete model.

 It is time consuming model.

It should be developed or built on company's cost.

Thanks for listening

us patiently….