00:13 Explanation of calculating sigma square for activities 02:03 Drawing Activity on Arc and calculating critical pass 03:47 Understanding critical pass in PERT analysis 06:07 Understanding how to divide numbers and process resulting values. 08:28 Calculating lineage and Dazs using the same law 10:31 Calculating z based on specified criteria 13:02 Probability of project completion in 32 days 15:27 Definition and implementation of propylene project