A grey prediction model was constructed according to the accumulated data in history of working procedure, and with this model the grey time limit was whitened to certain value. 該方法根據工序作業(yè)時(shí)間歷史積累的數據，建立灰色預測模型，將工程計劃中具有灰色特性的不確定性工序作業(yè)時(shí)間白化為確定值。
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