Schedule Updating and Project Control - Construction Project Scheduling and Control - page 207

Draw the updated network. Calculate the new project completion date.
Check if there are changes to the completion date and/or to the critical path.
Mention the causes for such changes, if any.
18. “If the logic used in creating this schedule was accurate, there should be no dif-
ference between the Retained Logic and Progress Override options.” How much
do you agree with this statement? Explain.
19. How is project updating tied to pay requests?
20. Explain what is meant by the term contractor-created float.
21. Explain the steps usually taken in a monthly update of a schedule.
22. Does the scheduler have to “explain” the results of the update to the project
manager? When? Why or why not?
23. During the life of a project, the scheduler receives a lot of feedback on the schedule
from different parties, such as the architect, the engineer, the owner, the subcon-
tractors, and others. As a scheduler, how would you take and implement or reject
such feedback?
24. Can the critical path in a project change during the life of the project? How can
such a thing happen? Give an example.
25. Management must pay attention not only to critical activities but also to
near-critical activities. Explain this statement from a practical point of view.
26. List each of the six methods for measuring the work progress of a certain activity.
Under what conditions would each be recommended? Give an example for each
method.
27. A roofer is working to cover a 2,500-square-foot roof. He must first install rafters,
then sheathing, then felt, and finally shingles. He assumes the previous tasks com-
pose 35%, 20%, 15%, and 30% of the total roofing activity, respectively. At a certain
point, the roofer gets the following information on the subtasks:

Unit a Subtask Total Quantity Installed Quantity

Rafters EA 150 102

Sheathing SF 2 , 720 1 , 200

Felt SQ 27 . 2 10

Shingles SQ 27 . 2 5

a EA = each; SF = square feet. SQ (square), is 100 square feet; a unit
used mostly in roofing jobs.

Calculate the estimated percent complete for the roofing activity.
28. Which method of measuring work progress is suitable for each of the following
activities?

a. Laying bricks for an exterior wall
b. Safety inspection