Aaron Tay writes: “Evaluation frameworks are a serious thread in information literacy, collection assessment, and procurement. The demand for them is real. My worry is that many evaluation matrices try to do too much at once. They aim to be universal. They give every criterion a score. They weight too many things equally. They also rely heavily on qualitative impressions, including for the thing that matters most when evaluating search tools: Whether the tool can retrieve and rank useful material.”