Difference between Scrum and Kanban?
Scrum Interview Preparation: Difference Between Scrum and Kanban
Scrum and Kanban are both Agile frameworks used to manage work and improve delivery, but they follow different approaches to planning, execution, and workflow management.
Scrum is time-boxed and structured, while Kanban is continuous and flow-based.
What is Scrum?
Scrum is an Agile framework that works in fixed-length iterations called Sprints (usually 1–4 weeks). It has defined roles, events, and artifacts to ensure structured delivery.
What is Kanban?
Kanban is a visual workflow management method that focuses on continuous delivery. It uses a Kanban board to visualize work and limit Work In Progress (WIP).
Scrum vs Kanban Comparison
| Aspect | Scrum | Kanban |
|---|---|---|
| Work Structure | Time-boxed Sprints | Continuous flow |
| Delivery | At end of each Sprint | Continuous delivery anytime |
| Roles | Defined (SM, PO, Developers) | No mandatory roles |
| Planning | Sprint Planning required | No fixed planning cycle |
| Change Handling | Changes discouraged during Sprint | Changes can be added anytime |
| WIP Limits | Not mandatory | Mandatory and core principle |
| Metrics | Velocity, Sprint Burndown | Cycle Time, Lead Time, Throughput |
| Best For | Projects with fixed iteration goals | Support, maintenance, continuous flow work |
Key Differences Explained
- Scrum: Focuses on delivering work in fixed Sprints with planning and review cycles.
- Kanban: Focuses on continuous flow of work without fixed iterations.
- Scrum: Has defined roles and ceremonies.
- Kanban: No strict roles or ceremonies required.
- Scrum: Encourages commitment to Sprint goals.
- Kanban: Encourages flexibility and continuous prioritization.
When to Use Scrum vs Kanban
| Situation | Best Choice |
|---|---|
| New product development | Scrum |
| Changing requirements frequently | Kanban |
| Fixed delivery cycles | Scrum |
| Support/maintenance teams | Kanban |
Example Interview Answer
Scrum is a time-boxed Agile framework that delivers work in Sprints with defined roles and ceremonies, while Kanban is a continuous flow system that focuses on visualizing work and limiting WIP. Scrum is best for structured delivery, whereas Kanban is best for continuous and flexible work environments.
Conclusion
Scrum and Kanban are both powerful Agile approaches. Scrum provides structure and predictability, while Kanban provides flexibility and continuous flow. The choice depends on the type of work and team maturity.