True concerning decision trees.May be useful in making effective supplier selection decision for repetitive purchase decisions, but not for one-time purchases.Cannot accurately reflect past decisions, so they are of limited value for future repetitive purchase decisions.Limited in value due to qualitative nature of tool.May be useful in making effective supplier selection decisions if probabilities of favorable and unfavorable outcomes are assessed for each option.May be useful in making effective supplier selection decision for the initial purchase decision, but not for repetitive purchases.