CPE Labor Productivity & Rates 3 — Questions and Answers
Question 1: Which of the following best describes 'all-in' labor rate as used in construction estimating?
- Base wage only
- Base wage plus fringe benefits, payroll taxes, and insurance (Correct answer)
- Overtime wage rate
- Union hall dispatch fee
Correct answer: Base wage plus fringe benefits, payroll taxes, and insurance
The all-in rate includes base wages plus fringes, FICA, FUTA, SUTA, workers' comp, and liability insurance.
Question 2: Weather delays on an outdoor project are best addressed in the estimate by:
- Ignoring weather since contracts exclude it
- Applying a weather day allowance to the schedule and escalating labor costs accordingly (Correct answer)
- Reducing the labor force during winter months only
- Adding 5% to material costs
Correct answer: Applying a weather day allowance to the schedule and escalating labor costs accordingly
Estimators should include weather day allowances based on historical climate data, which extends duration and increases labor costs.
Question 3: A productivity loss factor due to overtime is most pronounced when workers operate at:
- 40 hours per week
- 48 hours per week for one week
- 60+ hours per week for multiple weeks (Correct answer)
- 32 hours per week
Correct answer: 60+ hours per week for multiple weeks
Research shows cumulative fatigue causes significant productivity decline when sustained overtime exceeds 50–60 hours per week over multiple weeks.
Question 4: In the context of labor productivity, 'measured mile' analysis is used to:
- Calculate truck delivery distances
- Compare productivity in an unimpacted period versus an impacted period (Correct answer)
- Measure walking distances on large sites
- Determine overtime eligibility
Correct answer: Compare productivity in an unimpacted period versus an impacted period
The measured mile technique compares unit labor rates from undisturbed work periods against those from disrupted periods to quantify impact.
Question 5: FICA taxes payable by the employer on each worker's wages represent approximately:
- 1.45% for Medicare only
- 6.2% Social Security plus 1.45% Medicare = 7.65% of gross wages (Correct answer)
- 15.3% of gross wages
- 3.0% of gross wages
Correct answer: 6.2% Social Security plus 1.45% Medicare = 7.65% of gross wages
Employers match the employee's 7.65% FICA contribution (6.2% SS + 1.45% Medicare), making the employer burden 7.65%.
Question 6: Site congestion on a large industrial project primarily affects labor productivity by:
- Increasing material costs
- Reducing crew efficiency due to interference, restricted movement, and coordination overhead (Correct answer)
- Lowering overtime requirements
- Improving safety statistics
Correct answer: Reducing crew efficiency due to interference, restricted movement, and coordination overhead
Congested work areas force crews to wait for space, reroute material paths, and coordinate with other trades, reducing net productive time.
Question 7: When estimating labor for a T&M (time and materials) contract, the primary difference from a lump-sum estimate is:
- T&M requires no productivity factors
- Actual hours and rates are billed rather than estimated quantities times unit costs (Correct answer)
- T&M labor is always cheaper
- No burden or overhead is included in T&M rates
Correct answer: Actual hours and rates are billed rather than estimated quantities times unit costs
Under T&M, the owner is billed for actual hours worked at agreed rates, eliminating the need for quantity-based unit cost estimates.
CPE Labor Productivity & Rates 3
Which of the following best describes 'all-in' labor rate as used in construction estimating?