CPE CPE Project Scheduling & Time Management 1 — Questions and Answers
Question 1: Why is project schedule directly relevant to a CPE estimator's work?
- Schedules determine the owner's financing rate only
- Duration affects time-related costs such as general conditions, equipment rental, and financing (Correct answer)
- Schedules are prepared only by project managers, not estimators
- Schedule has no impact on material pricing
Correct answer: Duration affects time-related costs such as general conditions, equipment rental, and financing
Project duration directly drives time-sensitive costs including superintendent labor, site trailer rental, equipment standby, and construction loan interest.
Question 2: What is the 'critical path' in a construction schedule?
- The main access road to the job site
- The longest sequence of dependent activities that determines project duration (Correct answer)
- The path trucks use to deliver materials
- The shortest route through the project network
Correct answer: The longest sequence of dependent activities that determines project duration
The critical path is the longest chain of interdependent activities; any delay to a critical-path task directly extends the overall project completion date.
Question 3: General conditions costs (site superintendent, trailer, portable toilets, temporary utilities) are most accurately estimated by:
- A fixed percentage of direct costs regardless of duration
- Calculating a monthly rate and multiplying by scheduled project duration (Correct answer)
- Using last project's lump sum
- Applying a regional cost index
Correct answer: Calculating a monthly rate and multiplying by scheduled project duration
Because general conditions costs are time-dependent, the estimator must calculate a monthly burn rate and apply it to the projected project duration from the schedule.
Question 4: Which scheduling method uses arrows to represent activities and nodes to represent events?
- Critical Path Method (CPM) — Activity on Arrow (AOA) (Correct answer)
- Gantt chart
- Resource-loaded schedule
- Line of balance
Correct answer: Critical Path Method (CPM) — Activity on Arrow (AOA)
The Activity on Arrow (AOA) network diagram represents each task as an arrow between event nodes, forming a precedence network used in CPM analysis.
Question 5: A CPE estimator notices that the schedule calls for steel erection starting December 1 in Chicago. What cost adjustment is likely needed?
- No adjustment — steel erection is weather-independent
- Winter protection and heating costs should be added to the estimate (Correct answer)
- Reduce labor costs due to shorter days
- Eliminate concrete work only
Correct answer: Winter protection and heating costs should be added to the estimate
Cold-weather steel erection in northern US climates requires additional costs for worker protection, heaters, and potential schedule delays that the estimator must include.
Question 6: What does 'float' (or slack) mean in project scheduling?
- The amount of water used on site
- The number of days an activity can be delayed without extending the project end date (Correct answer)
- Profit margin above direct costs
- The variance between bid and actual cost
Correct answer: The number of days an activity can be delayed without extending the project end date
Float represents scheduling flexibility — an activity with 10 days of float can start up to 10 days late without pushing the project completion date.
CPE CPE Project Scheduling & Time Management 1
Why is project schedule directly relevant to a CPE estimator's work?