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In a PERT network, the activities on the critical path are a, b and c. The standard deviations of the durations of these activities are 2, 2 and 1 respectively. The variance of the project duration is

In a PERT network, the activities on the critical path are a, b and c. The standard deviations of the durations of these activities are 2, 2 and 1 respectively. The variance of the project duration is Correct Answer 9

Related Questions

Which of the following statements are comes for Network Critical Path? 1. The path of critical activities, which links the start and end events is critical path 2. It is the path of activities having zero float 3. It is the path of events having zero slack 4. The sum of the duration of the critical activities along a critical path gives the duration of the Project
Consider the following statement associated with critical path: 1. Critical path is the most important sequence of activities which has no float and which determine the project completion period 2. Critical path is the largest path with shortest duration within which the project can be completed 3. The difference between early start time and late finish time must be equal to the activity duration 4. Cannot pass through dummy activity Which is among the above are correct statements? 
Statement (I): Crashing of project duration always increases the cost of the project on its completion, no matter what the indirect, or overhead, costs are. Statement (II): The critical path along the project activities network diagram is compressed in the process of investigating the crashing of the project duration, and not the non-critical activities, up to a certain stage of crashing. 
Statement I The critical path has been defined as the longest duration path between the first and the last nodes of a project.
Statement II The duration of a project is not always the same as the duration of its critical path.
Statement III The earliest start and finish times of an activity are based on the condition that every activity will not be started and finished as early as possible.
Find the correct answer for given statements being correct or incorrect.
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
From the given below statements, find the incorrect statement. i. A critical path has zero float. ii. A critical path has both critical and non-critical activities. iii. A critical path is the longest path and consumes maximum time and resources.
A construction project consists of twelve activities. The estimated duration (in days) required to complete each of the activities along with the corresponding network diagram is shown below. Activity Duration (days) Activity Duration (days) A Inauguration 1 G Flooring 25 B Foundation work 7 H Electrification 7 C Structural construction - 1 30 I Plumbing 7 D Structural construction - 2 30 J Woodwork 7 E Brick masonry work 25 K Coloring 3 F Plastering 7 L Handing over function 1   Total floats (in days) for the activities 5-7 and 11-12 for the project are, respectively:
A project network comprises five activities as shown below. The activity durations. in days. are as indicated. Crashing of any activity costs Rs. 1000 per day. If the project is crashed to the shortest possible duration without changing the critical path the total crashing coso in Rs. is
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The activity-on-arrow network of activities for a construction project is shown in the figure. The durations (expressed in days) of the activities are mentioned below the arrows. The critical duration for this construction project is
Duration along the critical path defines which of the following? A. Shortest duration needed B. Shortest duration permissible C. Longest duration needed D. Longest duration permissible Select the code for the correct answer from the options given below: