Mechanical Engineering - Industrial Engineering and Production Management - Discussion
Discussion Forum : Industrial Engineering and Production Management - Section 2 (Q.No. 6)
6.
A PERT network has three activities on critical path with mean time 3, 8 and 6 and standard deviations 1, 2 and 2 respectively. The probability that the project will be completed in 20 days is
Discussion:
27 comments Page 3 of 3.
Ashok kumar said:
1 decade ago
Sigma is standard deviation = Under root of 1^2+2^2+2^2 means it will 3.
Z = (t-te)/under root of variance.
Z = (t-te)/under root of variance.
Ramanathan said:
1 decade ago
What is the 20? Is it from formula?
Axiss said:
1 decade ago
3+8+6/20 = 0.84.
Sumit agrawal said:
1 decade ago
Tell me about this question in detail.
Prakash patel said:
1 decade ago
What is sigma? Please explain briefly.
Udita Jain said:
1 decade ago
Sigma = 3.
Te = 3+8+6 = 17.
(20-17)/3 = 1.
So probability = 84%.
Te = 3+8+6 = 17.
(20-17)/3 = 1.
So probability = 84%.
Yawer abbas said:
1 decade ago
how we calculate project completion time probability through mean time of critical activities and standard deviation eaxmple:
A PERT network has three activities on critical path with mean time 3, 8 and 6 and standard deviations 1, 2 and 2 respectively. The probability that the project will be completed in 20 days is.
A PERT network has three activities on critical path with mean time 3, 8 and 6 and standard deviations 1, 2 and 2 respectively. The probability that the project will be completed in 20 days is.
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