Most comparisons of Scrum, Kanban, and Albatross are about philosophy. This one is about cells.
Five people. Sixty days. The same work, done three ways. One cell is one person, one day. The cells show where work happened, where it waited, and where it was squeezed.
Scrum
Tasks are dense at the start of each interval and crowded at the end. The sprint boundary forces the work to fit a calendar, so the last days are compressed — and some tasks push out of the lane entirely. The lane is the person. It can only hold so much.
Meanwhile, a few cells sit empty mid-sprint. A dependency wasn’t ready, and no one could proceed.
Scrum pays in overloaded people and in waits it can’t see coming.
Kanban
No boundaries. Tasks flow wherever they can, at whatever size they arrive.
The waits are the story. Cells sit empty at irregular points across the timeline — wherever a dependency was missed. They don’t line up across lanes, because nothing coordinates them. Each person waits on their own dependency, at their own time.
Nothing is crowded. There’s no boundary to squeeze against. So Kanban doesn’t overload people.
It wastes time instead.
Albatross
No boundaries, no crowding, no empty cells.
Every lane runs continuously. Every cell is occupied. The waits that appear in the other two diagrams — the mid-sprint stalls, the scattered dependency misses — don’t happen.
Not because the work is smaller or the team is faster. Because the dependencies were designed before construction began, and the schedule was plotted from that structure. Readiness is known before work starts. Nothing waits, because nothing was started before its dependencies were satisfied.
The Comparison
| Boundaries | Empty cells | Crowding | |
|---|---|---|---|
| Scrum | Yes | Some | Yes — at boundaries |
| Kanban | No | Throughout | No |
| Albatross | No | No | No |
Scrum pays in overloaded people. Kanban pays in lost time. Albatross pays in neither.
That’s the difference three diagrams can show. The reason is in the structure — and that’s the longer argument.
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