software development lifecycle

A software development lifecycle is a term that describes all of the tasks and activities involved in developing an application or program. A lifecycle includes everything from initial planning and consultation to final launch as well as ongoing maintenance.

There are different approaches to software development and every approach has some advantages. Many development teams choose lifecycle systems based on their benefits and their particular requirements. Here’s a brief overview of some of the different software development life cycles used today.

4 Popular Software Development Life Cycles

1. Waterfall

This is one of the most commonly used and popular software development cycles because it is so simple. It works like a waterfall, consisting of a linear sequential flow with one phase of development following the other. Developers only start to work on the next phase after the first phase is complete.

This approach to software development offers several advantages. It is easy to explain to other team members so there’s little room for miscommunication. The structured approach ensures the project remains on track more easily. All stages and activities of the project are clearly defined so all of a team’s members are on the same page. Verification at the end of every phase reduces the chances of error.

Unfortunately, this approach has several disadvantages as well. It is rigid and inflexible so developers are more likely to assume that all requirements are locked in. There’s little room for adjusting the scope or requirements of a project. The waterfall approach is much less unsuitable for large or complex development projects.

2. V-Shaped

The v-shaped model is similar to the waterfall model, with an added advantage of an early unit test phase. The model follows the Waterfall process until software plan implementation, after which it moves upward from unit testing to maintenance. Like the waterfall model, this approach is fairly straightforward and easy to understand.

The biggest advantage of the v-shaped model is that it has specific deliverables at every phase. Developers create test plans early during the lifecycle, which reduces the room for error and improves flexibility.  The v-shaped model is ideal for small, straightforward development projects with clearly defined goals and expectations.

However, this model is still very inflexible and it is difficult to adjust its scope once a project has launched. It is not possible to generate early prototypes using this model and there is not a clear structure for correcting errors.

3. Spiral

The spiral model or SDM is a great solution for large-scale and complicated projects. This model combines design and prototyping systems, making it more flexible. It still uses the main elements of a waterfall approach as the foundation, assigning different sections for planning, risk assessment, prototyping, and simulations, but offers more options to move backward or forward in the project.

The SDM system has several advantages like more realistic estimates, early developer input, and better risk management.

However, this approach to software development has some disadvantages as well. It can be very expensive and time-consuming. Developers need specialized training to utilize this approach effectively and the system has limited re-usability across different kinds of projects.

4. Agile

The agile approach has become very popular because it offers maximum flexibility and is suitable for all kinds of projects. This approach requires collaboration and movement between different teams as well as phases during the development process. Developers can go back to earlier phases after learning from their mistakes to optimize an application.

This approach has several advantages like decreased development time, time to take input from the team, customers, and stakeholders, and no guesswork. You get high-quality software that fits a customer’s requirements perfectly at the end of the process.

However, agile requires special training and skill which can involve an investment of time and money.

Choosing the right development lifecycle is essential to keep a project on track and ensuring the result lives up to the original specs. A successful software development lifecycle can produce software with the highest quality and lowest cost in the shortest time.

At number8,  our measure of success is delivering working software faster. That's why when it comes to meeting a project's full potential, we believe in embracing the agile development model. As an information technology company with many years of experience, we can help any team adopt the practices, processes, and tools needed to deliver with more agility. Interested in learning more? Let’s connect. Send us an email or give us a call and we can get the conversation started.

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