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Software development models: Top 3 | Gigavoice Blog

Software development models: Top 3

The software development process is generally a streamline that starts with planning and finishes with implementation and maintenance. However , search each software development team can take a different approach and define a different starting point. In fact, site it’s usually up to the software developers to choose a software development model for their processes. So which are the three most commonly used and most popular models? We explore here.

Choosing a software development model

 1. The Waterfall Model

Also known as a linear sequential life cycle model, the Waterfall Model is a simple software development model. The whole point is to finish development phases one at a time, and review each phase upon completion. Basically, every phase must be completed fully before starting the next one. Reviews after every phase determine whether or not you should proceed to the next one, or abort the project. There is no overlap between the phases.

This model is ideal for small and simple projects, but cannot be applied to complex and object oriented ones. The few advantages of the Waterfall Model include:

  • simple to use
  • easy to manage
  • easy to measure

However, the Waterfall Model of software development also includes numerous disadvantages, such as:

  • no option for going back and fixing or adjusting tasks
  • software work only at the very end of the project
  • not applicable to ongoing and object-oriented software projects
  • not for projects that need to change conditions and requirements during execution

In sum, the Waterfall model is a good software development model to use with simple and short projects where the technology is well known and the production environment is stable.

The Iterative Model

An Iterative Life Cycle Model does not start with full specifications or requirements which define the work to be done. Instead, The Iterative Model begins with one set of requirements, and finishes with one final product, itself only one part of final project. After the development of the first initial product, the product is reviewed and the process begins again, finishing with the next and updated version of the same product.

Advantages of this model are:

  • The first version of any software developed using the Iterative Model is a skeleton upon which other things can be built. In the beginning, only high level decisions about functionality need to be made.
  • Improvement is made step-by-step.
  • Less documentation, more design and coding.

Some disadvantages of the Iterative Model include:

  • Higher cost
  • every phase is completed once without overlap

In sum, the Iterative Model of software development is a good model for big projects where only major requirements should be defined at the beginning and the details evolve over time.

3. The V Model

The V Model, or Verification and Validation Model, is a software development model where execution of development phases happen in a sequential manner that is reflects in the shape of the letter “ V”. It is extension of the Waterfall model. Here also, the phases are executed one by one, but the difference is that after execution of each phase, testing is applied and the phase is finished when it is approved by the testing team. This is a highly disciplined model and it is useful for straight forward projects where all stages need to be tested and confirmed before moving forward and there is no going back to previous stages.

Choosing a software development model

In sum, the Waterfall and V models of software development can be counted on as traditional models of a sequential nature. This means that new phases of project development start only after finishing previous ones. Traditional models are suitable for projects with clear definitions and requirements that change little during execution.

In comparison, the Iterative Model is a modern software development model accommodates change and is ideal for projects where different factors such as the market can change requirements during execution of the process.

Software development model questions

What do you think is best for you and your project? Please let us know below. Likewise, we invite any questions you have about software development. We answer all queries with a personal and prompt response.

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