回溯：重新定义失败的算法

Backtracking in Product Development

When InterviewAI's first voice flow felt too slow, we didn't push forward in denial — we stepped back, simplified, and re-tested. Same for Band9AI writing feedback when an upgrade produced worse cohesion flags.

Documenting what you tried makes backtracking cheap. Moralizing dead ends makes it expensive.

Decision Search Tree (Conceptual)

{
  "decision_process": {
    "explore": "Try the promising path",
    "measure": "Did quality improve for real users?",
    "prune": "Abandon paths that fail the quality bar",
    "backtrack": "Return to last known-good approach",
    "commit": "Ship only after sustained improvement"
  }
}

Code Gives Second Chances

Engineering culture that rewards exploration with clean rollback beats culture that punishes wrong turns. Band9AI's methodology page exists because we document what we tried, what we pruned, and why — not just what shipped.