Why it is said that scope creep is not visible in burn-down chart? this might be a silly question, but anyway: pretty much every article discussing burn-up and burn-down charts states that in the latter, scope changes are invisible because the chart only shows how much work is left to be done. But I do not understand - the scope creep should appear as a spike in the remaining work, shouldn't it? I understand it could mask progress (if e.g. a day was added and burnt at the same time), so in automatical reporting it might cause some issues. Otherwise, if my scope gets bigger, I would simply update the remaining work which would manifest as a spike in the burn-down chart.

The answer resides on the Y axis, which displays scope. On a burn up chart, when scope is added, your plan line will increase and will be visible on the Y axis. If scope is added on a burn down, the result would appear in the X axis, or extended duration. Extended duration most certainly is an indicator of scope creep but also indicates other drivers.

![enter image description here](

![enter image description here](