A scheduling technique that considers slack time to increase or decrease the calculated lead time of an order is
答案解析
解析：
For backward scheduling, slack time is the difference between the latest start date and the earliest start date; For forward scheduling, it the difference between the earliest completion date and the latest completion date, therefore, slack time provides an element of flexibility in planning, positive slack time allows an increase in lead time while negative slack time requires that it be shortened, in probable scheduling, we take slack time into account to increase or decrease lead time;
For Probable scheduling, the operations are distributed evenly between the earliest start date and the latest completion date, then the start or completion date of each operation is its probable start date or problem completion date;
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