Is lean software development an agile methodology?

Yes, Lean software development is often considered an Agile methodology, as it shares many principles and values with the Agile Manifesto. Both Lean and Agile methodologies aim to deliver value to customers quickly and adapt to changing requirements. They also emphasize collaboration, customer feedback, and iterative development.

Lean software development originated from manufacturing principles, particularly the Toyota Production System, and was later adapted to software development by thinkers such as Mary and Tom Poppendieck. Lean focuses on eliminating waste, optimizing efficiency, and delivering value to customers through continuous improvement.

Key principles of Lean software development include:

1. Customer Value: Focus on delivering value to the customer and eliminating anything that does not contribute to that value.

2. Elimination of Waste: Identify and eliminate waste in the development process, such as unnecessary processes, extra features, or delays.

3. Continuous Improvement: Encourage a culture of continuous improvement where teams regularly reflect on their processes and seek ways to enhance efficiency and quality.

4. Just-in-Time: Deliver work just in time to meet customer demand, avoiding unnecessary delays and excess inventory (unfinished work).

5. Empowering Teams: Empower cross-functional teams to make decisions and take ownership of the development process.

6. Optimizing the Whole: Optimize the entire development process rather than sub-optimizing individual components.

While Lean and Agile share many commonalities, it's essential to note that Lean has its own set of principles and practices. Some organizations might adopt Lean principles alongside Agile methodologies like Scrum or Kanban, creating a blend of practices that suit their specific context.

In summary, Lean software development is often considered a subset of the broader Agile movement, with both approaches prioritizing customer value, collaboration, and adaptability. Teams may choose to adopt Lean practices in conjunction with other Agile methodologies to create a customized approach that best fits their needs.