Scrum vs. Kanban
Two widely used agile development frameworks: Scrum uses fixed-length sprints with defined ceremonies and roles, while Kanban uses continuous flow with visualized workflow stages and work-in-progress limits.
Full Definition
Scrum and Kanban are both agile frameworks for managing work, but they take fundamentally different approaches. Scrum organizes work in fixed-length sprints with defined planning (sprint planning), execution monitoring (daily standup), review (sprint review), and improvement (retrospective) ceremonies, and defines specific roles (Product Owner, Scrum Master, Development Team). The sprint commitment and regular cadence create predictability and team focus. Scrum is best suited to product development work with a defined roadmap of features to be delivered where a regular planning and delivery cadence aligns with stakeholder communication needs. Kanban organizes work as a continuous flow: items are pulled from the backlog into active work stages (In Progress, In Review, Done) as capacity becomes available, with explicit Work-in-Progress (WIP) limits at each stage preventing the queue buildup that creates multitasking and delayed delivery. There are no fixed time boxes, no mandatory ceremonies, and no prescribed roles in pure Kanban. The flow visualization and WIP limits are the primary governance mechanisms—making the current state of work visible and preventing the team from starting more than they can complete. Kanban is best suited for operations and support contexts where work arrives unpredictably and must be processed continuously rather than planned in discrete batches. Many engineering teams use hybrid approaches: Scrumban (Scrum with Kanban-style WIP limits and flow metrics) or Scrum for planned product development with a separate Kanban board for operational and support work that runs concurrently with sprint commitments. The most important principle is not doctrinal adherence to either framework but consistent application of the chosen approach, with regular retrospective improvement. Teams that switch frameworks every few months because "Scrum isn't working" or "Kanban isn't working" often have underlying planning, backlog management, or collaboration problems that no framework change will resolve.
FAQs
What is 'Scrumban' and when does it make sense?
Scrumban blends Scrum's sprint planning cadence with Kanban's continuous flow management. Teams using Scrumban typically retain sprint planning and retrospectives from Scrum (for regular prioritization and improvement) while replacing sprint commitment with Kanban-style pull and WIP limits (for more flexibility in managing unexpected work). Scrumban makes sense when a team has too much operational and support work to make reliable sprint commitments, but still benefits from regular planning sessions and retrospectives to improve their process.
How do you choose between Scrum and Kanban for a new engineering team?
Choose Scrum when: the team's primary work is planned product development from a defined backlog, stakeholders want regular visibility into what will be delivered and when, and the team can protect sprint commitments from operational interruptions. Choose Kanban when: work arrives unpredictably (support tickets, maintenance requests, production incidents), response time is more important than delivery predictability, or the team struggles with planning accuracy because work complexity is too variable to estimate reliably. When uncertain, start with Scrum and adjust toward Kanban practices (adding WIP limits, relaxing sprint commitments) as experience reveals the team's actual work patterns.
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