Assignment7_612_std49532
Name Aye Thida
Roll No EMCS-980
Assignment7
(a) Major project risks should be identified and assessed to establish their probability and
consequences for the project. For risks which are probable and potentially serious, plans to
avoid, manage or deal with that risk when it arises should be made. Discuss the risks, the
probability of the risk arising and the effects of these risks.
Risk Type Possible Risk
Technology The database used in the system cannot process as many
transactions per second as expected.
Software components which should be reused contain
defects which limit their functionality.
People It is impossible to recruit staff with the skills required. Key
staffs are ill and unavailable at critical times.
Required training for staff is not available.
Organizational The organization is restructured so that different
management are responsible for the project.
Organizational financial problems force reductions in the
project budget.
Tools The code generated by CASE tools is inefficient.
CASE tools cannot be integrated.
Requirements Changes to requirements which require major design
rework are proposed.
Customers fail to understand the impact of requirements
changes.
Estimation The time required to develop the software is
underestimated.
The rate of defect repair is underestimated.
The size of the software is underestimated.
Both the probability and the assessment of the effects of a risk may change as more
information about the risk becomes available and as risk management plans are implemented.
Once the risks have been analyzed and ranked, you should assess which are most
significant. Judgment must depend on a combination of the probability of the risk arising and the
effects of that risk.
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Assignment7_612_std49532
(b) The following table sets out a number of tasks, durations and dependencies. Draw an activity
chart showing the project schedule and find the critical path.
ES=Earliest Star
EF=Earliest Finish
LS=Latest Start
LF=Latest Finish
ES DUR EF
LS ACT LF
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Fig_b.1
Assignment7_612_std49532
0 10 10 0 15 15
5 T1 15 0 T2 15
15 7 22
15 T3 22
22 15 37 22 9 31
22 T4 37 28 T5 37
37 5 42
37 T6 42
42 8 50 31 9 40
42 T7 50 51 T8 60
50 10 60
50 T9 60
60 13 73
60 T10 73
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Assignment7_612_std49532
Fig_b.2
duratio slac
Activity ES EF LS LF n k
T1 0 10 5 15 10 5
T2 0 15 0 15 15 0
T3 15 22 15 22 7 0
T4 22 37 22 37 15 0
T5 22 31 28 37 9 6
T6 37 42 37 42 5 0
T7 42 50 42 50 8 0
T8 31 40 51 60 9 20
T9 50 60 50 60 10 0
T10 60 73 60 73 13 0
An Activity Chart Showing the project schedule
Activity Duration Assume day start 10 Jan
T1 10 10-Jan-19
T2 15 25-Jan-19
T3 7 1-Feb-19
T4 15 16-Feb-19
T5 9 25-Feb-19
T6 5 2-Mar-19
T7 8 10-Mar-19
T8 9 19-Mar-19
T9 10 29-Mar-19
T10 13 11-Apr-19
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Assignment7_612_std49532
10-Jan-19 30-Jan-19 19-Feb-19 11-Mar-19 31-Mar-19 20-Apr-19
T1 10
T2 15
T3 7
T4 15
9 Assume day start 10 Jan
T5
Duration
T6 5
T7 8
T8 9
T9 10
T10 13
Critical Path
Activity EF LF duration slack(LF-EF)
T2 15 15 15 0
T3 22 22 7 0
T4 37 37 15 0
T6 42 42 5 0
T7 50 50 8 0
T9 60 60 10 0
T10 73 73 13 0
Total duration 73
Therefore, the critical path is T2, T3, T4, T6, T7, T9 and T10.
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