A Complete Guide to Software Process Model: Top 7 Models You Should Know
Software development is a pretty straightforward workflow; it consists of creating ideas, coding, testing, and implementing software product installations in your organization. In order to build high-quality software products on time, a software process model provides guidance to help developers stay on track by following an ordered process (i.e., modeled). Without some sort of process model to rely on, it is likely that software development teams will not be organized, frequently will miss deadlines, and probably will produce substandard products.
A software process model gives software developers an order in which each step of the software development process should be accomplished; therefore, there is much less chance for problems to occur when they have an established sequence of steps to follow when completing a software development project. However, different types of software development projects will require varying types of software process models.
In this article, we will define the most frequently used types of process models found within business organizations and give some insight into how organizations may use process models in order to succeed at completing their software development efforts.
What is a Software Process Model?
Software process models are frameworks that define how to organize & execute software development activities; They describe the sequence of steps to go from initial idea to finished product (in general).
Process models help project teams to keep themselves organized, keep the project moving consistently through time, and provide an effective way for project stakeholders, including developers and managers, to communicate with each other.
Choosing an appropriate model can help to improve project efficiency, reduce risk, and create a final product that meets business needs. Models can emphasize different elements that may be considered based on project needs, such as flexibility, risk management, or faster delivery.
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Why Software Development Teams Use Process Models
The software development process involves many different teams, tasks, and timelines. It is very difficult to organize all of these activities if you do not have a structured process in place.
Process models make it easier for your project team members to break down large and complex projects into manageable phases or small tasks. This allows team members to work on a single phase at a time while still keeping their overall progress measurable and under control.
Some of the additional benefits of using a software process model are: better planning, improved quality assurance, document clarity, and improved team collaboration. In addition, by using a software process model, you can quickly identify and correct problems before they affect the project as a whole.
Top 7 Software Process Models You Should Know
- Waterfall Model
The waterfall model has long been an established and traditional approach to software development. In the waterfall model, software development flows through a linear sequence of stages like requirements analysis, design, development, testing, and maintenance.
The completion of one stage is followed by the beginning of the next stage. The waterfall model is generally used when the requirements of a project are clearly defined from the start and can, therefore, follow a structured methodology.
The waterfall model is less flexible when changes occur during development than other models. After moving from one stage to the next stage, it can be difficult and costly to revisit earlier stages to make changes.
- Agile Model
The agile model provides flexibility and continuous improvement throughout the development process. Instead of developing a full product all at once, the agile model divides the work into small iterations.
Each iteration produces a small but usable part of the finished product, which includes team gathering feedback, refining software, and creating new features for the next iteration.
The agile model’s iterative nature allows for quick adjustments due to changing requirements and encourages collaboration between the development team and business stakeholders.
- Iterative Model
The iterative model involves software development through cycles or repetitions. In other words, rather than building the entire software at one time, it involves building it in parts or through repetition.
It involves planning, designing, building, and testing in each repetition or cycle. The software becomes complete with each repetition or cycle.
This type of software development involves constant improvement or enhancement of the software through repetition or cycles.
- Spiral Model
The spiral model involves combining two important techniques in software development: iterative software development and effective risk management.
The process involves repetitions or cycles called spirals. Each repetition or cycle involves four major steps or stages: planning, analysis of risks, building or development, and testing or evaluation.
The team or developer involved in software development always considers the risks involved before proceeding with the next step or stage. The spiral model is used in the development of complex and large-scale software due to the effective risk management involved in it.
- V-Model
The V-Model is a variation of the waterfall method, where emphasis is placed on strong testing and validation at every stage or level of development.
In the V-Model, each phase or level of development is matched to a corresponding verification and validation phase (testing phase). For example, requirements or requirements analysis phase would link to acceptance testing; the system design or functional design phase would link to system testing.
Having this structure will ensure that testing activities will be planned early in the life cycle and will result in a greatly enhanced software and a higher quality/reliability.
- Prototype
The prototype model refers to the process of creating a working version of the product to show to the stakeholders before you begin development of the final product. The working prototype gives the stakeholders (end-users) a better understanding of what/how the software will function.
By allowing users the opportunity to interact with the working prototype, they will be able to provide feedback to the developers. That feedback can then be used to determine/modify requirements and improve software design.
This model of development is useful when the original requirements of the project are not completely defined; basically, this will give the development team a way to work through and validate ideas before doing full scale development effort.
- DevOps Model
In the DevOps model, there is an emphasis on collaboration between teams working towards developing a product and a team responsible for operating the product. The main focus is on delivering software more quickly, whilst maintaining a high standard of quality.
There are many tools and methods related to DevOps, including Automation, Continuous Integration, Continuous Testing, and Continuous Deployment. These will enable companies to release software updates to their end-users in a timely manner, whilst enabling the immediate response to user feedback.
The DevOps model promotes a culture of shared responsibility between the development and operations teams, meaning that the two teams will work together throughout the entire lifecycle of a product.
How to Choose the Right Model for Your Project
Choosing which software development model to use depends on several factors, such as the size, complexity, and budget of the project, as well as how this fits within the overall timeframe available for delivery.
A formal approach – such as the Waterfall model or the V model – is usually best for a project where requirements are well defined. An agile or iterative approach would most probably suit a project that requires flexibility and frequent updates.
When deciding on the approach to your project, an organization should consider the experience level of the teams, any potential risks, and the degree of customer involvement. The correct model will result in better project execution and outcomes.
Conclusion
Developing software can involve numerous facets that come together to form a cohesive process that needs to be planned for and organized through the use of a defined process model that allows the team to organize tasks properly, manage risks, and produce quality software products efficiently.
Each software process model offers its own advantages based upon the type of project being developed, where some may be structured with detailed documentation, and others will allow for great flexibility with rapid delivery of the software product.
Organizations that understand the various process models will be able to select the best suitable to meet their development needs as well as their business objectives.
Author’s Bio:
Sarah Lewis is an IT Project Manager in Binmile Technologies, a custom software development company in the USA. She has more than 10 years of experience in the IT sector. She likes to write technical articles in her free time.