What is the difference between Scrum and Kanban methodologies?

Scrum and Kanban are Agile methodologies focusing on iterative development and rapid response to change.

Scrum

• Fixed iterations: Work is divided into sprints of fixed duration (usually 1-4 weeks).
• Roles: Clearly defined roles: Product Owner, Scrum Master, Development Team.
• Ceremonies: Regular events: sprint planning, daily stand-up, sprint review, sprint retrospective.
• Focus: Creating a potentially shippable product at the end of each sprint.
• Change: Changes in functionality are not made during the current sprint.

Kanban

• Continuous flow: Work is carried out in a continuous flow without fixed iterations.
• Roles: No predefined roles, focus on team self-organization.
• Ceremonies: May be present but are not mandatory: daily stand-ups, retrospectives.
• Focus: Visualization of the workflow (Kanban board), limiting work in progress (WIP limits), and continuous flow improvement.
• Change: Encouraged and can occur at any time.

Key differences:

Criterion	Scrum	Kanban
Iterations	Fixed sprints	Continuous flow
Roles	Clearly defined	No predefined roles
Ceremonies	Mandatory and regular	Optional
Changes	Made between sprints	Can be made at any time
Focus	Creating an increment of the product	Managing flow and WIP limits

Application:

• Scrum is suitable for projects where it is possible to clearly define the scope of work for an iteration and regular delivery of increments is required.
• Kanban is effective in situations with an unstable task flow, the need for quick response to changes, and supporting existing products.