Waterfall Model advantages and disadvantages

Waterfall Model advantages and disadvantages with examples.


What is the waterfall model? Definition of waterfall model?

When to use the waterfall model?

Diagram of waterfall model?

Phases of the waterfall model?

Waterfall Model advantages and disadvantages

Advantages of the waterfall model?

Disadvantages of the waterfall model?


What is the waterfall model? Definition of waterfall model?

As you wanna read Waterfall Model advantages and disadvantages. The waterfall model is a sequential model. It divides the development of software into different phases. Each phase is designed in a way that it performs its specific activities during the software developing life cycle.

This model is the first model ever use for the system. The waterfall model is also known as the linear-sequential life cycle model. This model is very simple to understand. It is very easy to use, once you understand it. As in the waterfall model, the entire system is divided into small phases so, each phase needs to be completed before jumping toward the next phase. It is because the output of the first phase becomes the input of the second phase. The output of the second phase becomes the input of the third phase and so on. This process continues until the last phase comes and a system is developed.

At the end of each phase, it is important to take a review to determine that the project is on the right path. This step will help you to decide whether to continue or discard the project.



When to use the waterfall model?

This type of software development model is basically used for projects which are small and there are no certain requirements.

This model is termed as a waterfall model because the model develops systematically from one phase to another in a downward fashion.


Diagram of Waterfall Model:

Here is a general overview of the “Waterfall Model”.


Waterfall Model advantages and disadvantages



After phases, we will study about Waterfall Model advantages and disadvantages,

Phases of the waterfall model:

The waterfall model has several phases. Below is a detailed description of all the phases.


  • Requirement Gathering And Analysis:

Using the analyst, the requirements are gathered in this phase. These requirements are documented during this phase. Clarifications can also be sought. The business analysts document the requirements based on the discussion about the project, with their customers.

  • System Design:

In this phase, the architect and senior members of the teamwork on the software architecture, low level and high-level design for the project. The architect creates the architecture diagram and low/high-level design document.

  • Implementation:

In this phase, the work is done on coding the project by the development team. The take the design documents. They study the document and ensure that their solution follows the design finalized by the architect. The senior developers review the codes of other developers’ code for any issue.

  • Testing:

In this phase, the testing team tests the entire application and identifies, if there are any defects in the application. If there are any defects, they are fixed by developers the testing team tests again to ensure that all the defects are fixed.

  • Deployment:

In this phase, the application is built and installed on the server by the team. The team also coordinates with network and IT administrative teams to finally get the application run on the production servers.

  • Maintenance:

In this phase, the entire team ensures that the application is running smoothly on the servers. And there is no downtime.

Waterfall Model advantages and disadvantages:

Here is a list of Waterfall Model advantages and disadvantages.

Advantages of the waterfall model:

The following are the Waterfall Model advantages and disadvantages in the next heading.

  • The waterfall model is easy to understand.
  • The waterfall model is simple to use.
  • Due to the rigidity of the waterfall model, it is easy to manage.
  • In waterfall model phases do not overlap.
  • The waterfall model is excellent for small projects.
  • Phases are processed in time.
  • Phases are completed in time.
  • As it works for small projects, it can be delivered on time.
  • It is very easy to identify errors.
  • Design errors are identified before the software is written.
  • The requirements of the waterfall model are easily understood.


Disadvantages of the waterfall model:

  • There is a high amount of uncertainty and risk.
  • It is not good for big and complex models.
  • It is a poor model for object-oriented projects.
  • It is not suitable if the requirements change.
  • It is difficult to add new requirements in the waterfall model.


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