All the following describe the critical path of a schedule EXCEPT:

Management has determined the need to release the product 20 days earlier than planned. What tasks need to be expedited?

Assuming that you had only one crane capable of 30 lifts per day, 3 column pours requiring 28 lifts each, plus associated assorted work requiring an additional 150 lifts, what is the minimum planned working duration for this work?

If drafting of the product manual overruns its planned duration by 5 days, how many days may the manufacturing be delayed without affecting release of the product?

Activity durations are normally estimated in an intuitive and subjective way. All of the following will improve duration accuracy EXCEPT