“I may not have gone where I intended to go, but I think I have ended up where I needed to be.” ― Douglas Adams
Now that we’ve completed a round of tree testing, we should have lots to act on – revisions to trees that performed well, discarding of trees that just didn’t work, identifying which elements to pursue and which to leave behind, tweaking of terms that participants had trouble with, and so on.
If we found a tree that tested extremely well, and only needs very minor tweaks, we may be “done” as far as tree testing is concerned. More likely, though, we’ll want to make some major decisions and revisions, and those will need retesting to make sure our changes were the right ones.
Retesting also provides two big wins to the organization, beyond a better site tree:
Single tree vs. competing trees, keeping a record, no pandering
Selecting the best from each tree
Fixing misunderstandings, retiring high-success tasks, updating answers
If we didn't get them quite right the first time
Avoid reusing participants unless the pool is small
70% success and no more substantial revisions