Additional information for the Student Workbook for MNG91217: Project Management WEEK 4 Work Breakdown Structure to be used in week 4 Updated WBS, including time…

Additional
information for the Student Workbook for MNG91217: Project Management

WEEK
4

Work Breakdown Structure to be used in week 4

Updated WBS,
including time estimates to be used in activity 4.1.

Please do NOT go
back to week 3 and change your estimates there based on this table.
Simply use this table going forward in the following activities.
Estimates in this table are optimized for crashing the project plan,
not to reflect the best/most realistic time estimate.

When you crash
the project you can change the resources assigned to an activity,
however in this case the dependencies will remain the same to
limit/simplify your options.

WBS Code

Activity
Name

Predecessor(s)

Duration
(hrs)

2

Purchase
supplies

 

8

3

Shutters

 

 

3.1

Repair
shutters

2

4

3.2

Paint
shutters

3.1

2

3.3

Hang
shutters

3.2

2

4

Porch

 

 

4.1

Repair
porch

2

8

4.2

Paint porch

4.1

4

5

Floor

 

 

5.1

Repair
floor

2

8

5.2

Sand floor

5.1

4

5.3

Refinish
(paint) floor

5.2

8

6

Painting

 

 

6.1

Paint
ceilings

5

8

6.2

Paint doors

6.1

4

6.3

Paint
interior walls

6.2

8

6.4

Paint
exterior walls

2,
3 & 4

8

7

Windows

 

 

7.1

Wash
exterior windows

2,
6.1 & 6.4

8

7.2

Wash
interior windows

2,
6.2

8

7.3

Hang
curtains

2,
6.2, 7.2

3

8

Project
completion

 

 

The crash parameters to be used for activity 4.1

Crash
parameters

The initial
limitation was that only one person could perform a task at a time.
To improve for time you are now allowed to have Apprentice II
accompany you. By adding Apprentice II, who has the same skill set as
you, the time estimated for that task is reduced by 50%. The cost
however logically increases with $40 per hour. For example, if
Apprentice II helps you to hang the curtains, and you had estimated
that to take 3 hours, you can now do that task in 1.5 hours, at the
cost of $40 per hour.

The Contractor
also has a son who is planning to become a carpenter, and is involved
in a pre-apprenticeship Workplace Learning Program. Allowing the
contractor’s son to assist his father is a good learning
opportunity for him, but comes at the additional cost of $25 per
hour. The work in turn can be completed 25% faster. For example, if
repairing the wooden floor was estimated at 8hrs of work, it can be
completed in 6hrs at the total cost of $900.

Lastly, both
apprentices can work together as well, as Apprentice II can learn
from Apprentice I. As they make a good team together, they can cut
the time of each task in half.

Please keep in
mind, it is up to you how many activities you crash, none, all, or
any number in between.

The only
task that cannot be crashed is the shopping on day 1

The full crash
parameters are displayed in the table below:

Resources

Original
Cost per hour

Crash
Time

Crash
Cost per hour

You

$
0.00

n/a

n/a

Contractor

$
125.00

n/a

n/a

Apprentice I

$
60.00

n/a

n/a

Apprentice II

$
40.00

n/a

n/a

You and
Apprentice II

n/a

50%

$
40.00

Apprentice I
and Apprentice II

n/a

50%

$
100.00

Contractor
and his son

n/a

25%

$
150.00

I know some of
the crash parameters may seem unrealistically optimistic. They have
been chosen to make sure you will be able to finish the project
within the parameters, and with room to further optimize it.
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