Iterative vs Incremental Model – Summary - David-Lennuk/Buketov_Python GitHub Wiki

1. Iterative Model Definition: The iterative model involves developing a system in repeated cycles, refining and improving it with each iteration. Each cycle incorporates feedback, making the system more complete over time.

Key Characteristics:

Development happens in repeated iterations.

Feedback-driven improvement.

Allows changes based on testing and user feedback.

Example: Developing a mobile app where the first version includes basic functionality, and later iterations refine performance and add features based on user feedback.

Advantages:

Early detection of issues.

Flexibility in adapting to changes.

Continuous improvement based on real-world usage.

Disadvantages:

Requires continuous user involvement.

Might lead to scope creep if changes are not controlled.

2. Incremental Model Definition: The incremental model builds the software in small, usable increments. Each increment adds a new functional part to the system until it is fully developed.

Key Stages:

Requirements gathering

Design

Development of each increment

Testing & integration

Example: Building an e-commerce website where the first increment includes user registration and product catalog, the second adds a shopping cart, and later increments introduce payment processing and order tracking.

Advantages:

Faster delivery of functional parts.

Easier risk management since critical functions are built first.

Early user involvement.

Disadvantages:

System complexity increases over time.

Initial increments might not provide full functionality.

3. Iterative vs Incremental Model – Comparison