Scrum vs Kanban vs Scrumban

Iterations1-4 week sprints
Continuous work alongside releases shorter than one week or bigger iterations like goalsContinuous work with short cycles for planning and longer cycles for release
Work routinesPush and pull principle mixed with early binding to team members
Pull principle with late binding to team membersPull principle with late binding to team members
Scope limits
Sprint limits total work amount
Work in progress limits current work amountWork in progress limits current work amount
Planning routines
Sprint planningRelease/iteration planning, demand planningPlanning on demand for new tasks
EstimationMust be done before start of sprint

Performance metrics
BurndownCumulative flow diagram, lead time cycle time
Average cycle time
Continuous improvement
Sprint retrospective
OptionalShort Kaizen event as an option
MeetingsSprint planning, daily scrum, retrospective
Can be avoided
Short Kaizen event
RolesProduct owner, Scrum master, teamTeam and other work specific rolesTeam and other work specific roles
Team membersCross-functional team membersCross-functional team members, specialization is allowedSpecialization or preference to tasks
Task sizeThe size that can be completed in sprintAny sizeAny size
New items in iterationForbiddenAllowed whenever queue allows itAllowed whenever queue allows it
OwnershipOwned by a team
Supports multiple teams ownershipSupports multiple teams ownership
BoardDefined/reset each sprintPersistentPersistent
PrioritizationThrough backlogOptionalRecommended on each planning
RolesScrum master, product owner, teamNot defined, may varyNot defined, may vary
RulesConstrained process
Only a few constraints, flexible process
Slightly constrained process
Fit forEnterprise maturity for teams working on product or especially project which is longer than a yearSupport and maintenance teams, continuous product manufacturingStartups, fast-pace projects, continuous product manufacturing

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