Collaborative Organisation Tool Must Accept the Changesfleeting
At first, we have a vision and an idea of the path to take.
When the time passes, and we have a clearer idea of what we want, we normally have changes of mind and realize how naive our previous ideas were.
This sounds like a common approach in the agile methods and they all (IIUC) thrives for iterations, allowing one to reflect periodically on the path already taken and the path on front of us.
People have to mitigate the sunk cost fallacy and the tool should make very easy changing the plan. Otherwise, the cognitive cost of changing the plan, associated to the sunk cost fallacy will be a « good excuse » not to change of plan.