sdlc software development life cycle

Top 8 Industry Models for Software Development Life Cycle (SDLC)

Models of the Software Development Life Cycle (SDLC) provide guidance through the challenging and intricate process of developing software. Numerous development life cycle models have been created in order to accomplish a number of crucial goals. Selecting the appropriate SDLC model is crucial since it affects a project’s quality, timeliness, budget, and capacity to satisfy stakeholders.

We’ve selected the top 8 software development models to demonstrate their key characteristics and how they could help your organisation, since we are your reliable source for services related to software development.

Top 8 Software Development Models

We’ve selected the top 8 software development models to demonstrate their key characteristics and how they could help your organisation, since we are your reliable source for services related to software development.

However, “Agile Methodology” is now the most well-liked product on the market.

Let’s take a quick look at each model individually:-

1. Waterfall Model

waterfall model -sdlc

One well-known and effective SDLC (System Development Life Cycle) approach for software engineering is the waterfall model. All development stages—analysis, design, coding, testing, and deployment—are cascaded via the process. Every phase includes well specified precise targets.

Moreover, until the last development stage is finished, it is difficult to observe or test the programme, which raises serious project risks and possible unanticipated consequences. Errors are costly to rectify, therefore testing is often hurried.

Pros of Waterfall Model
  • This model is clear-cut and straightforward to comprehend.
  • This is quite helpful for little tasks.
  • It’s simple to handle this model.
  • The ultimate objective is predetermined.
  • This model’s phases are all clearly stated.
  • It offers a methodical approach to tasks.
Cons of Waterfall Model
  • Since risk is not evaluated in this approach, there is a great deal of risk and uncertainty.
  • In this case, the testing phase starts relatively late.
  • This algorithm’s sequential structure makes it unrealistic for the modern world.
  • The above design is not suitable for intricate and large-scale tasks.

2. V Model (Validation & Verification Model)

v model - Software Development Life Cycle

Known also as the Verification and Validation Model, the V-Model is an SDLC model. The V-Model is a popular and widely-used disciplined model in software development. Each step in the V-Model is executed sequentially, meaning that a new phase begins only after the conclusion of the preceding phase. Similar to the Waterfall instance, all needs are gathered up front and are non-modifiable. The development activity is represented on the left side of V-Design, while the testing activity is represented on the right side.

Pros Of V Model
  • This model is straightforward and user-friendly.
  • It is possible to plan, test, and design tests prior to coding.
  • This is a very methodical model where development and testing are carried out step by step.
  • Problems are found right from the start.
  • With it, small- and medium-sized developments are simply finished.
Cons Of V Model
  • No complicated project is a good fit for this paradigm.
  • There is still a great deal of risk and uncertainty.
  • An ongoing project is not appropriate for this approach.

3. Incremental model

incremental model - sdlc

Iterations of the incremental development process are necessary (modular software architecture in the “Lego-style” is mandatory!). New software modules are added with little to no modifications to previously installed components in each cycle. 

In a similar manner, software modules are added with each release until the entire system is built. Nonetheless, there should be clear guidelines for breaking up a big project into several phases or iterations. Furthermore, modifications made during development are still costly and challenging to execute, despite the fact that problems in requirements specifications, code, and architecture can be found early on. All requirements are collected at the outset and are non-changeable, similar to the Waterfall scenario. 

If we comprehend the incremental methodology concept in its entirety, it begins with the development of a preliminary implementation, gathers user feedback, and progresses through multiple iterations until a system that is deemed acceptable.

Pros of Incremental Model
  • The requirements and scope of this model can be changed more easily and at a lower cost.
  • The consumer can provide feedback on each module and reply if any changes are needed.
  • The progress of a project can be measured.
  • Debugging and testing are easier with a short iteration.
  • Errors are easy to identify.
Cons of Incremental Model
  • Managing is an ongoing task that needs to be completed.
  • This calls for careful design and preparation.
  • This model has a greater overall cost.

4. Spiral Model

spiral model - Software Development Life Cycle

One model of the software development process is the spiral model. The Spiral model emphasises careful evaluation of risks. You must therefore involve those who have a solid background in risk appraisal if you want to fully benefit from the model. Iterations of a software project repeat these cycles over and over. A more and more finished version of the programme is created after every cycle. This model’s most unique feature is that risks are recognised at every stage and addressed through prototyping. Another name for this feature is Risk Handling.

This is the model where the customer plays a major role. They are able to take part in the review and exploration phases of the cycle. Revisions from the client are not accepted in the development phase.

Pros of Spiral Model 
  • The spiral concept works well for intricate and big tasks.
  • The cost of the project is simple to estimate.
  • In every stage of this methodology, risk analysis is conducted.
  • The consumer can only view the software’s appearance at its early phases of development.
  • Consumer satisfaction is more likely when the consumer is consulted often during the development process.
Cons of the spiral model is:
  • Small tasks are not a good fit for this model.
  • This model is rather expensive.
  • More documentation is needed for this model than for others.
  • Periodically, the project must be assessed and reviewed by knowledgeable specialists.

5. Iterative Model

iterative model - sdlc

Under the iterative model, we begin developing the programme after establishing certain requirements, and it is then reviewed after development. If there are specifications that need to be changed, we create a new software version according to those specifications. Every iteration brings about changes, evolution, and growth in software through iterative development. Software design is consistent because iterations build upon one other.

The shortcomings of the traditional waterfall paradigm were addressed in the development of this model.

Pros Of Iterative Model
  • Errors and defects are easily found in iterative model systems.
  • This model allows for the speedy preparation of software with certain parameters.
  • With each iteration, testing and debugging the software gets easier.
  • We receive trustworthy user feedback in addition to blueprints.
  • This concept can be simply modified to meet evolving demands.
Cons of Iterative Model
  • Small projects shouldn’t use the iterative methodology.
  • It is difficult to oversee the complete software development process in this paradigm.
  • It is quite hard to predict when the whole software will be available.

6. The Rational Unified Process (RUP)

rup - Software Development Life Cycle

Iterative and linear frameworks are also combined in the Rational Unified Process (RUP). The software development process is broken down into four parts by the model: conception, elaboration, construction, and transition. While it is still slower and less flexible than a pure Agile group (Scrum, Kanban, XP, etc.), RUP helps generate strong and flexible solutions. The degree of client contact, the amount of documentation, and the duration of iterations may all change depending on the needs of the project.

Pros Of Rational Unified Process
  • Aids in adjusting to and managing ambiguous needs.
  • Lays out certain guidelines that a group must adhere to.
  • Keeps expenses and other resources from being wasted.
  • Needs producing trustworthy documentation
Cons of Rational Unified Process
  • Because the process is complex, a team of qualified professionals is needed.
  • Process that is intricate and poorly organised.
  • An increased reliance on risk mitigation.
  • Challenging to continually incorporate.

7. Prototype Model

prototype model - sdlc

Software applications or system software prototypes that are used to visualise different software components are the foundation of the Prototype Model. By enabling substantial interaction and input from the user, this paradigm aims to bridge the gap between misinterpreted needs. When we were not fully aware of the needs, this model was developed. This model’s unique feature is its ability to be utilised both alone and in conjunction with other models.

Pros Of Prototype Model
  • The Prototype Model can save time 
  •  Money when there is a high level of user participation.
Cons of Prototype Model
  • The Prototype Model can save time 
  • Money when there is a high level of user participation.
  • His approach might lead to a misunderstanding among users regarding the distinction between a prototype 
  • A final product, which could cause the development of prototypes to take longer than necessary.

8. The Agile – Development Models

agile model sdlc

Almost 70% of companies employ the Agile technique, out of all the software engineering models, for their IT projects. Agile development, in general, is centred around iterative development, extensive communication, and early customer input. Iterative and incremental models are combined to create the agile model, which is composed of both types of models. The largest issue is that the customer requests adjustments to the product while it is still being developed. These improvements are expensive and time-consuming to implement.

The primary purpose of the agile model’s creation was to allow for modifications to be made throughout the software development process, hence expediting the project’s completion.

Pros of Agile Model
  • This method of developing software is really practical.
  • In this, collaboration is emphasised.
  • This has relatively few regulations, and there is also very little documentation.
  • Planning is not required for this.
  • It is easily manageable.
  • It gives developers flexibility.
Cons Of Agile Model
  • It is unable to manage intricate dependencies.
  • Development is confused as a result of this absence of official documentation.
  • The amount of time and effort needed to develop software is unknown at the beginning of the process.

Which Model of the SDLC Is Best for You?

All of these SDLC Models provide a distinct procedure for the range of project difficulties you will face in your professional life. Selecting the best one is mostly dependent on the project’s execution conditions as well as the desired result.

Why are businesses adopting agile approaches to software development?

Software was created using the iterative waterfall model in the past. However, developers now have a lot of challenges. The largest issue is that the customer requests adjustments to the product while it is still being developed.  The primary purpose of the agile model’s creation was to allow for modifications to be made throughout the software development process, hence expediting the project’s completion. 


Agile emphasises a customer-centric methodology that continuously solicits feedback from clients and modifies software development in real time to meet their requirements and expectations. Deliverable Agency leverages digital technology to propel corporate success across several industries. In addition to our dedication to providing top-notch software solutions and products, we also provide a wide selection of professional software development services that are suited to your individual requirements.


The planned, designed, developed, and tested software applications are carried out using standardised processes and techniques known as software development methodologies. These approaches offer a structure for overseeing a software project’s requirements collection, coding, testing, and deployment phases.

Standardised frameworks known as software process models are used to describe the phases and procedures that go into creating software applications. These models offer an organised method for developing software, guaranteeing that all crucial stages are methodically handled.

The Software Development Life Cycle (SDLC) offers an organised method for creating software applications, guaranteeing that the process proceeds in a methodical and well-structured manner.

The Agile model emphasises using an incremental and iterative approach to combine an effective response to changing requirements. Because project requirements and solutions are constantly changing while the project is being produced, agile projects are among the finest SDLC approaches for enterprises.

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