What is the difference between software development life cycle (SDLC) models, and how would you choose the right one for a project?

In my final year at university, I was part of a team project where we developed a simple mobile application aimed at helping students manage their schedules. We chose the Agile model because we wanted to incorporate continuous feedback from our peers. Every two weeks, we would present our progress and make adjustments based on the feedback received. This iterative process allowed us to improve functionality and user experience dynamically. By the time we finished, we had a product that not only met our initial goals but also included features that our testers suggested, which made it more user-friendly.

While working part-time at a local business, I helped revamp their website. We chose to use the Waterfall model due to the clear, linear requirements from the business owner. Initially, we gathered all the requirements and created a detailed project plan. Each phase, from design to implementation, was completed before moving on to the next. This approach worked well because the business had specific needs and wanted a straightforward website without many iterative changes. It taught me the importance of aligning the SDLC model with project clarity and client expectations.

In my first job as a junior software developer, I worked on a team developing a new feature for an existing application. We opted for the Spiral model because the feature had multiple risk factors and required extensive user testing. The combination of iterative development and risk assessment allowed us to address potential issues early on. This experience highlighted how important it is to choose an SDLC model that fits the project’s risk level and complexity, ensuring that we delivered a robust and reliable product.