Milestone	Duration	Optimistic (t)	Most Likely (t)	Pessimistic (t)	PERT Calculation (t)	Critical Path Variance ()	Standard Deviation ()
Airport Frequency Study	14	9	14	20	14.167	3.36	1.83
Antenna Placement Analysis	21	16	21	28	21.333	4.00	2.00
FCC Application Submission & Approval	30	25	30	35	30.000	2.78	1.67
FAA Application Submission & Approval	30	10	30	37	27.833	20.25	4.50
Wi-Fi Requirements Analysis	21	15	21	26	20.833	3.36	1.83
Wi-Fi System Installation	21	15	21	26	20.833	3.36	1.83
Wi-Fi Acceptance Test	5	3	5	8	5.167	0.69	0.83
Mobile Radio Requirements Analysis	21	15	21	27	21.000	4.00	2.00
Mobile Radio Installation	28	25	28	32	26.000	1.36	1.17
Mobile Radio Acceptance Test	5	3	5	8	5.167	0.69	0.83
Ground Control Requirements Analysis	28	20	28	32	27.333	4.00	2.00
Ground Control Installation	30	20	30	44	30.667	16.00	4.00
Ground Control Acceptance Test	14	10	14	22	14.667	4.00	2.00
RFID Luggage System Requirements Analysis	30	28	30	34	30.167	1.00	1.00
RFID Luggage System Feasibility Study	21	16	21	30	21.667	5.44	2.33
Totals	319 Days				317 Days	74.29 Days	8.62 Days

Calculate probability Now that you have the project t_eand the project standard deviation, answer the following questions:

What is the probability of achieving your t_edate?

What date corresponds to a 95% probability?

If the airport requests to reduce your t_edate by 1 week, what is the probability of achievement? What is the probability of achieving a 2-week reduction?