Scrum vs Kanban for UK Software Development — Honest Comparison (2025)
Scrum is better for fixed-scope product development (defined backlog, sprint commitments, predictable delivery). Kanban is better for ongoing maintenance, support, and continuous delivery work where priorities shift frequently. Most UK software agencies (including ClickMasters) use Scrum for the build phase and Kanban for post-launch maintenance retainers. Both are compatible with fixed-price contracts — Scrum via sprint-based delivery, Kanban via monthly capacity. Scrum vs Kanban is a practical UK software delivery decision that affects how your project is planned, how progress is measured, and how changes are handled. Here is a straightforward comparison based on real UK software delivery experience.
| Factor | Scrum | Kanban |
|---|---|---|
| Time structure | Fixed 2-week sprints | Continuous flow — no sprints |
| Planning cadence | Sprint planning every 2 weeks | On-demand — replenish queue as needed |
| WIP limits | Implicit (sprint capacity) | Explicit WIP limits per column |
| Change management | Changes wait for next sprint | Changes can be pulled immediately if capacity |
| Progress visibility | Burn-down chart (remaining sprint work) | Lead time, throughput, WIP metrics |
| Best for | Fixed-scope product development | Maintenance, support, continuous delivery |
| Fixed-price compatibility | Excellent — sprint commitments align with delivery | Good — monthly capacity model |
| GDS Service Standard alignment | Build phase | Post-live iteration phase |
| ClickMasters default | Build phase (Scrum) | Post-launch retainer (Kanban) |
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