Agile software development is guided by principles emphasizing flexibility, collaboration, customer satisfaction, and continuous improvement. These principles, encapsulated in the Agile Manifesto, include:

1. Customer Satisfaction: Deliver valuable software early and frequently to ensure satisfaction, allowing for regular feedback and alignment with customer needs.
2. Welcoming Change: Embrace changes even late in development to stay competitive and relevant.
3. Frequent Delivery: Deliver working software frequently, promoting continuous progress and regular feedback opportunities.
4. Collaboration: Ensure close, daily collaboration between business stakeholders and developers, reducing misunderstandings and aligning goals.
5. Motivated Individuals: Build projects around motivated individuals, providing support and trust to enhance productivity and creativity.
6. Face-to-Face Communication: Use direct communication as the most efficient method to convey information, reducing delays and clarifying expectations.
7. Working Software as Progress: Focus on delivering functional software as the primary progress measure, ensuring development efforts provide tangible value.
8. Sustainable Development: Promote practices that maintain a constant pace, preventing burnout and ensuring long-term productivity.
9. Technical Excellence: Continuously focus on technical excellence and good design, reducing technical debt and easing future changes.
10. Simplicity: Maximize the amount of work not done, focusing on essentials to keep the project lean and manageable.
11. Self-Organizing Teams: Empower teams to take ownership of their work, leading to higher quality outcomes and increased innovation.
12. Regular Reflection: Reflect regularly to become more effective, adapting behaviors and improving processes continuously.

Contributions to Project Management and Product Delivery

• Flexibility and Adaptability: Agile allows quick responses to changing requirements, keeping the product relevant.
• Customer Collaboration: Regular interaction ensures needs are understood and met, enhancing satisfaction.
• Transparency and Visibility: Frequent releases and feedback loops foster trust and collaboration.
• Quality and Risk Reduction: Emphasis on excellence and testing improves quality and reduces defects.
• Empowered Teams: Promotes autonomy and motivation, leading to engagement and productivity.
• Continuous Improvement: Regular reflection and adaptation lead to better processes and outcomes.

These principles enhance project management and product delivery, making agile methodologies successful and adaptive.