Software Development Model — Iterative Development
The Software Development Life Cycle (SDLC) is like a roadmap for creating software. It breaks down the process into stages and assigns tasks to respective people. This helps keep things organized and within a set schedule and on budget. There are several types of development models, and we’ll focus on Iterative Development in this article.
Iterative Model
The iterative life cycle model avoids starting with a complete set of requirements. Instead, it commences by specifying and creating a portion of the software. This section is reviewed to uncover additional needs. This loop is repeated, generating a new software version with each cycle of the model.
For example:
- In iterative work, we make a basic version first, then make it better in the next round, and keep improving in each round until it’s done
- Imagine drawing: first, a rough sketch, then cleaner lines, and finally, adding finishing touches
- Similarly, in the iterative model, the entire product is built gradually, step by step
Diagram of the Iterative Model
Advantages of the Iterative Model
- In the iterative model, we start with a broad application design before building the actual product. We then create a preliminary version and evolve the design based on what’s built
- In this approach, the product is developed and refined in steps. This helps catch defects early and prevents them from spreading
- With the iterative model, we gather dependable user feedback. By sharing sketches and blueprints, we ask users to envision how the product will function
- Documentation takes a back seat in the iterative model, allowing more time for designing
Disadvantages of the Iterative Model
- Each phase in an iteration is rigid without overlaps
- There might be costly system architecture or design problems as not all requirements are collected upfront for the entire project duration
When to Use the Iterative Model
- Complete system requirements are well-defined and understood
- Suitable for large projects
- While major requirements are set, some details can change over time
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