What activities are concurrent to Activity 2001 in the "normal" schedule?
Answer(s): B
Analyze Activity 2001 in the "Normal" Schedule:Activity 2001 ("River Diversion Stage 1") has a duration of 92 days under the "Normal" schedule.The logic column shows it has a Successor ID of 2002, and a Finish-to-Start (FS) relationship with no lag. This indicates that Activity 2002 will begin immediately after Activity 2001 finishes.Identify Concurrent Activities Using the Schedule Logic: To determine concurrency, we need to look for activities that overlap in time with Activity 2001 during its duration. Concurrent activities must either:Start before Activity 2001 finishes, orFinish after Activity 2001 starts.Review Activities in the Normal Schedule:Activity 1001 ("Preliminary Civil Work"):Has a duration of 85 days, starts before Activity 2001, and overlaps with it.Logic: Its successor is Activity 2001 (Start-to-Start [SS] relationship), confirming the overlap.Activity 1000 ("General Conditions"):Duration is 1072 days. However, this is an overarching activity, and its inclusion is not specific to being concurrent with Activity 2001.Activity 7001 ("Permanent Roads"):Starts much later, after Activity 2001 ends, and thus is not concurrent.Activity 2003 ("River Diversion Dam"):Starts after Activity 2001 completes (FS relationship), so it is not concurrent.Conclusion: The only activity that overlaps and runs concurrently with Activity 2001 in the "Normal" schedule is Activity 1001.
PSP Study Guide (2019), Chapter on Schedule Development, Section 2.2.4 – Relationships: Discusses how Start-to-Start (SS) and other dependencies impact concurrency.AACE Recommended Practice 10S-90: "Cost Engineering Terminology" for definitions of concurrent activities.
Using the "normal" schedule, and assuming you are billing on the last day of the month for previous month and for appropriate partial months, how many invoices will you have for this project?
Answer(s): A
Understanding the Requirement:The "normal" schedule duration is 1072 days for Activity 1000 (General Conditions).Billing occurs at the end of each month for the previous month.Partial months are included in billing cycles.Total Project Duration in Months:Total days: 1072.Convert to months: 107230.44≈35.2\frac{1072}{30.44} \approx 35.230.441072≈35.2 months.Include partial months, which adds 1 additional invoice.Total Invoices:Full months: 35.Partial months: 7 (assuming each partial month is rounded up to include invoicing).Total invoices = 35+7=4235 + 7 = 4235+7=42.PSP Principles Cross-Verification: PSP guidelines emphasize accurate conversion of schedule durations into calendar billing periods for effective cash flow management (Ref: PSP Study Guide, Chapter 2B: Schedule Output and Deliverables).
Based on the stated costs, what percentage of the total cost comes from the 2000 series of activities?
Answer(s): D
Cost for 2000 Series Activities:Activity 2001: $150,000.Activity 2002: $25,000.Activity 2003: $18,000.Activity 2004: $96,000.Total: 150,000+25,000+18,000+96,000=289,000150,000 + 25,000 + 18,000 + 96,000 = 289,000150,000+25,000+18,000+96,000=289,000.Total Project Cost:Total cost: $7,308,000 (sum of all activities in "normal" schedule).Percentage Contribution:289,0007,308,000×100≈3.95%\frac{289,000}{7,308,000} \times 100 \approx 3.95\%7,308,000289,000×100≈3.95%.Verification with PSP Guidelines: The PSP Study Guide emphasizes accuracy in percentage-based cost contributions as a critical analysis tool in project cost management (Ref: PSP Study Guide, Chapter 1B: Cost Breakdown Structure).
For the late finish for Activity 11001, select the most appropriate response for transitioning from the forward pass.
Late Finish (LF) Transition Rule:Late finish (LF) is calculated by adding one day to the early finish (EF) of the final activity.EF of Activity 11001 is given, and the late finish is simply EF+1EF + 1EF+1.Cross-Verification with PSP Guidelines: PSP methodologies state that late finish is derived from the forward pass using early finish logic, with specific adjustments based on activity relationships (Ref: PSP Study Guide, Chapter 2A: Forward and Backward Pass Calculations).
Determine the correct formula and date for the late start for the Activity 11001:
Answer(s): C
Late Start Formula:Late Start (LS) is calculated as LF−DurationLF - \text{Duration}LF−Duration.For Activity 11001: LF−25=16Jan2024LF - 25 = 16 Jan 2024LF−25=16Jan2024.Cross-Verification with PSP Guidelines: This formula aligns with the PSP methodology for backward pass calculations, where late start is directly computed from late finish and duration values (Ref: PSP Study Guide, Chapter 2A: Schedule Analysis).
Determine the correct formula and date for the late finish for Activity 9004.
Analyze the Data and Logic:Activity 9004 ("Valve House Embankment"): This activity has a direct Finish-to-Start (FS) relationship with Activity 10002, with a lag of 7 days.Late Start (LS) and Late Finish (LF): In backward pass calculations, the late finish of the successor activity is adjusted for lag and task duration to determine the late start of the predecessor activity.Formula for Late Finish (LF):The Late Finish of Activity 9004 is derived by taking the Late Start (LS) of Activity 10002, subtracting the lag of 7 days, and subtracting 1 day to calculate the exact finish date.Correct Date Calculation:Given the Late Start (LS) of Activity 10002:LS.10002 = 11-28-03.Apply the formula: LF.9004 = LS.10002 - Lag.7 - 1 day = 11-28-03 - 7 days - 1 day = 11-20-03.Cross-Verification with Answer Options:Option A: Incorrect. Misrepresents the formula.Option B: Incorrect. Incorrect application of logic and lag adjustments.Option C: Incorrect. Omits the correct lag consideration.Option D: Correct. Matches both formula and calculated date.
Determine the correct formula and date for the late start for Activity 9001.
Activity Details (9001 - "Spillway - Concrete"):Duration: 175 days in the Normal schedule.To calculate Late Start (LS), the Late Finish (LF) is required. LS is calculated by subtracting the activity's duration from the LF.Formula for Late Start (LS): LS = LF.9001 - Dur.9001.Date Calculation:Late Finish (LF.9001) = 11-20-02 (given or derived).Apply the formula: LS.9001 = LF.9001 - Dur.9001 = 11-20-02 - 175 days.Cross-Verification of Dates:After subtracting 175 days, LS.9001 = 11-20-02.Cross-Verification with Answer Options:Option A: Incorrect. EF (Early Finish) is not needed for this calculation.Option B: Incorrect. Uses LS and Dur incorrectly without connecting to LF.Option C: Incorrect. Data provided is sufficient.Option D: Correct. Matches both the formula and the date calculation.
PSP Study Guide (2019), Section 2A – Schedule Development, Subsection on Backward PassCalculations.AACE Recommended Practices, RP 10S-90, discussing Late Start and Late Finish calculations.
Determine the correct formula and date for the late finish for Activity 2002.
Activity Relationships:Activity 2002 is directly succeeded by Activity 2003 in the schedule.The late start (LS) of Activity 2003 determines the late finish (LF) of Activity 2002, adjusted by any lags or additional constraints.Late Finish Calculation Formula:LF of 2002 = LS of 2003 - 1 day.This accounts for the predecessor-successor logic and the sequence of activities.Date Calculation:Late start of 2003 = 10-06-01.Late finish of 2002 = 10-06-01 - 1 day = 10-05-01.Verification:PSP guidelines emphasize that late finish values are derived by subtracting any relevant time constraints from the successor's late start (Ref: PSP Study Guide, Chapter 2A: Backward Pass Calculations)
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