Which statement about critical chain methodology is


Which statement about critical chain methodology is best?

1) Activity durations estimated at a 50% level of successful completion are shorter than those estimated at a 90% level of successful completion.

2) Aggregated activity durations at a 90% level of successful completion are shorter than aggregated activity durations at a 50% level of successful completion.

3) The total safety buffer for aggregated activity durations is smaller than the sum of safety buffers for individual activity durations at any likelihood level estimate.

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Operation Management: Which statement about critical chain methodology is
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