Agile originated from modern development practices such as Lean. It involves fast feedback loops and iterative development in contrast to the Waterfall method, where everything follows a pre-defined path from start to finish.

Modern day software development is highly centered on agile methodologies. To implement a proper agile environment, it is necessary to understand the philosophy behind agile in addition to the systems.

Philosophy

The agile manifesto describes 12 principles which form the philosophy of agile.

Some of them are:

Individuals and interactions over processes and tools
Working software over comprehensive documentation
Customer collaboration over contract negotiation
Responding to change over following a plan

Also see:

Tips on Implementing Agile

Use cases

UX improvement
Reverse Pitching

Software

Trello
Jira

Workflows

Has a parallel workflow
Scrum
Extreme Programming

Key points

User stories - how a ustomer wants to use the product
Story Points
Mix team skills in
Incorporate feedback from stakeholders during process
No stress of final deadline

Roles

Users - Submit Stories
Product Owner - Create User Stories, Rank stories
Teams - Insert stories into sprints
Scrum Master - Break stories into tasks

Backlinks

Left-click: follow link, Right-click: select node, Scroll: zoom