You have just used the network planning model for a county road resurfacing project and found the critical path length is 40 days and the standard deviation of the critical path is 10 days. Suppose you want to pick a time (in days) within which you will complete the project with 90% confidence level, what should be that time (in days and round to the nearest whole number.)
A) 40
B) 13
C) 45
D) 29
E) 53

Question

Quizplus · Accepted Answer

To find the time with 90% confidence, use the formula: mean + Z * standard deviation. For 90% confidence, Z is approximately 1.28. So, 40 + 1.28 * 10 = 52.8, rounded to 53 days.

You Have Just Used the Network Planning Model for a County