Construction Management Engineering

Planning Engineer Interview Questions and Answers (Q & A)

Q1: What is a Base Project Schedule?
A baseline is an approved programme by both parties which is used as a benchmark to measure the progress of a project.

Q2: How much duration a milestone activity normally equal?
All types of milestones have zero durations

Q3: What is the difference between Free Float & Total Float?
Free Float: the amount of time we can delay an activity without affecting the early start date of its successor activity.
Total Float: the amount of time we can delay an activity from its early start date without delaying the whole project finish.

Q4: What is the CPI?
It’s a Cost Performance Indicator and it evaluates the progress of works in the sense if the project is under-budget, over-budgeted or on track. The formula for CPI is: CPI =EV/AC

Q5: What is the SPI?
It is the Schedule Performance Indicator and indicates the performance of work is completed to the baseline schedule. The formula for SPI is SPI= EV/PV

Q6: What is a different % complete type in Primavera P6?
Physical Percent Complete
Units Percent Complete
Duration Percent Complete

Q7: What is the different duration type in Primavera P6?
Fixed Units
Fixed Units/time
Fixed Duration & Units
Fixed Duration & Units/Time

Q8: What are the different types of activities in Primavera P6?

  • Task-Dependent: In this type assigned resources are scheduled based on the activity’s calendar itself.
  • Resource Dependent: In this type, the assigned resources are scheduled based on assigned calendars.
  • Level of Effort: This type of activity goes with dependent activities like administrative issues.
  • Start Milestone: This is designated for the start of a major phase or stage of a project.  A milestone that has zero duration. It is just like a flag.
  • Finish Milestone: This is designated for the finish of the major phase or stage of a project. A milestone that has zero duration. It is just like a flag.

Q9: How does Primavera P6 calculate total float?
Total Float = Late Start – Early Start
or
Total Float = Late Finish – Early Finish

Q10: What is the difference between the recovery schedule and the revised schedule?
Recovery schedule: Here we maintain the same project completion date as in consented baseline but modification could be done to those activities which are yet to start or progressing by crashing and resource acceleration
Revised schedule: Here we slipped the consented project completion dated and we plan for activities which are yet to start or progressing