Software Development Life Cycle (SDLC)  process is the important topic to learn as a beginner. SDLC helps to create a detailed plan to Develop, Maintain, Replace even Alter a Software system.

SDLC Stages:

There are different stages of SDLC which include Planning, Designing, Building, Testing and Deploying the developed Software.

SDLC Models:

The popular three different SDLC models are as follows,

  • Waterfall Model
  • Spiral Model
  • Agile Model

Few other SDLC Models are Incremental Model, V-model, Iterative Model, RAD Model, and Prototype Model.

7 Phases of Software Development Life Cycle



This 7 stages of software development life cycle approaches are used to understand the software which is under development. Using this product life cycle you can easily build a system in a structured way.

SDLC stages can also be repeated for rework or to modify the Software.

  • Planning
  • Analysis
  • Design
  • Development
  • Testing
  • Implementation
  • Maintenance

Credo Systemz explains Waterfall Model


What is Waterfall Model?

Waterfall Model is very simple and easily understandable model which is introduced at first. This model is suitable for the development of small-scale projects.

Waterfall Model | SDLC

In Waterfall Model the new phase begins only when the previous phase is fully completed, Thus overlapping of the phases will not occur in Waterfall Model.

Waterfall Model Advantages:

  • Very simple and easy to learn this model
  • Suitable for Small Projects
  • Newbies can easily understand the phases of this model
  • Overlapping issues will not occur
  • Every single phase can be reviewed separately

Credo Systemz explains Spiral Model


What is Spiral Model?

Spiral Model is also called as Risk-Driven Process model, which combines the idea of Waterfall and Incremental model but provides more emphasis on risk analysis.

Spiral Model | SDLC

This Spiral model consists of four different phases which include Planning, Risk Analysis, Engineering & Evaluation.

Spiral Model Advantages

  • Emphasis more on risk analysis, hence avoidance of Risk is assured
  • Can be suitable for Large-scale projects as well
  • Using this model the software can be developed early
  • The development process works in a systematic way

Credo Systemz explains Agile Model


What is Agile Model?

Agile Software Development Life Cycle Model focuses more on Process Adaptability and Customer Satisfaction. This is also a type of Incremental Model which works by breaking the software project into small incremental builds.

Agile Model | SDLC
Each and every piece of the project is released after testing its quality. The documentation of the process is carried out parallel to the development lifecycle.

Agile Model Advantages:

  • The realistic approach in developing the software results better in customer satisfaction
  • Very flexible to developers and easy to manage
  • Documentation is easy because of the minimal rules
  • This SDLC model is suitable for the projects with both fixed and changing requirements

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