Q1. Solve problem 27, page 182 of Mantel.
a.Find the expected time and variance for each task.
b.Draw the network (either AOA or AON) and the critical path and time. You may use MS Project or draw it manually. In either case, highlight or name the critical path and state the duration. c.Find the probability that the critical path will be completed in 23 weeks d.What is the probability that the other main paths will be completed in 23 weeks? e.If the paths are independent, what is the probability that the entire network will be completed in 23 weeks? SOLUTION:

(a)Expected time and Variance is calculated in the Excel file attached. (b)The AOA network is drawn below:

(c ) (d) and (e) done in the Excel Spreadsheet

Q2. Solve problem 25 on page 265 of Mantel.
a.CV
b.SV
c.SPI
d.CPI

SOLUTION:
According to the Question,
Earned Value (EV) = $272,000
Actual Costs (AC) = $270,000
Planned Value (PV) = $261,000
We know that:
Cost Variance (CV):
CV = EV – AC
Cost variance = $272,000 – $270,000 = $2,000
Schedule Variance (SV)
SV = EV – PV
Schedule variance = $272,000 – $261,000 = $11,000
Cost Performance Index (CPI)
CPI = EV / AC
CPI = 272,000/270,000 = 1.01
Schedule Performance Index (SPI)
SPI = EV / PV
SPI = 272,000/261,000 = 1.04
Q4. (Solver) Given the network below:
a.Draw and submit the AOA network
b.What is the critical path?
c.Using Excel Solver, determine the minimum duration. The new price is:

...Instructor: Johnny Wan
Question (1)
I would have accommodated David Cheung’s vacation request.
According to the network diagram above
The criticalpath of the project is:
Activity 1 Activity 2 Activity 5 Activity 7 Activity 10 Activity 13 Activity 15
As audit of liquid assets (activity 4) is not on the criticalpath, it is not a critical activity. This slack job has a slack time of 178 hours for which...

...innovative windows-based delay analysis method, called the effect-based delay analysis method (the EDAM method). The EDAM method performs delay analysis using extracted windows and determines delay impacts by considering the effects of delays on the criticalpath(s). According to its application to hypothetical cases and comparisons with other methods, the EDAM method is efficient in delay analysis and effective in solving concurrent delays and determining schedule...

...CriticalPath Procedure
1. Develop a list of the activities that make up the project.
2. Determine the immediate predecessor(s) for each activity in the project.
3. Estimate the completion time for each activity. For example:
Activity Immediate Predecessor Time
A - 3
B - 1
C - 2
D A, B, C 4
E C, D 5
F A 3
G...

...Crash Task on criticalpath
We are confronted with having to reduce the scheduled complete time of a project to meet a deadline. The project duration can be reduced by applying more resources like more labor, additional equipment, and working overtime hours to complete the project.
After observing the MSP timeline, we selected the most critical tasks for the project:
Framing 14-16 Floors Steel Framing
Concrete Flooring 7-16
Rough-Ins...

...out each activity, in three parts:
1. Optimistic timing: The shortest time to complete an activity
2. Most likely timing: The completion time having the highest probability
3. Pessimistic timing: The longest time to complete an activity
5. CriticalPath Estimating: This determines the total time required to complete a project.
PERT not only determines the time to complete a specific software development activity, but also determines the cost....

...
CriticalPath
However the duration of the project is meaningless without identifying what is driving the project, why the project takes so long, what possible action is required to shorten the duration or what possible risk may extend the project...
Among the set of activities interconnected on the diagram; there is always one longest duration path from start to end of the project travelling through the network, Carmichael D. (2006, p.51). This...

...CPM - CriticalPath Method
In 1957, DuPont developed a project management method designed to address the challenge of shutting down chemical plants for maintenance and then restarting the plants once the maintenance had been completed. Given the complexity of the process, they developed the CriticalPath Method (CPM) for managing such projects.
CPM provides the following benefits:
Provides a graphical view of the project....

...CriticalPath Analysis – Revision Guide
CPA is a project analysis and planning technique that identifies the individual tasks of a
project, places them in the correct sequence and allows for identification of the criticalpath
In order to construct a CPA, you need:
1. List of all the activities required to complete the project
2. The time (duration) that each activity will take to
completion
3. The dependencies between the...

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