Formulas

Question 1

Parametric estimating formula:

Answer 1

[Quantity of work] x [Productivity rate]

Question 2

What is the formula for three-point estimating?

Answer 2

(a) + (b) + (c) / 3

Question 3

What is CV and it’s formula?

Answer 3

Cost Variance:

• The difference between a task’s value at the measurement date and its actual cost.
• CV = EV - AC

Question 4

What is SV and it’s formula?

Answer 4

Schedule Variance

• Compares activity’s actual progress to date vs. estimated progress
• Represented in terms of cost
• Tells you whether the schedule is ahead of or behind what was planned for this period
• SV = EV - PV

Question 5

What is the formula for CPI?

Answer 5

Cost Performance Index:

• Measures the value of the work completed at the measurement date against actual cost.
• Most critical of all EVM measurements
• If less than 1, you are spending more than anticipated for completed work
• CPI = EV / AC

Question 6

What is the formula for SPI?

Answer 6

Schedule Performance Index

• SPI = EV / PV
• If SPI is less than 1, you’re behind schedule at the measurement date.

Question 7

What is the formula for Lines of Communication?

Answer 7

n(n-1) / 2