calsberge case study

Managerial Decision Methods
Case Study --------Tasty Snax Cookie Company

Group member:

Dennis Debosschere, Wenzhu Jiang, Yiwei Song,
Bavo Van Kerrebroeck, Rui Yan, Jingyuan Zhang

Q1, Draw a network for the project described in the case.

Q2:
How long will the project take to complete? And which activities are critical? After drawing the structure of project plan, we have to research the duration while the project take to complete. We will find the activities that must be completed on time for the project to complete on due date.
We know all of activities’ required time and immediate predecessors, finding out the longest sequences of activities in a project plan. For

example, from the started point of A1, its required time is 2 weeks and for
B1 is 3 weeks. A2 ( the required time is 5weeks) must be following these two activities, the consequence is that A2 start at the beginning of fourth week and is finishing in the end of eighth week. The longest sequence of this example is B1 and A2.
Through the calculation of the longest sequence, the project complete in the 52 weeks and its critical path is A1 and B1--> A2 --> B5 --> B6
--> A4 --> A5 --> B9 --> B11 --> A6 --> A7 --> A8. Therefore, all of activities involved in the path is critical, answer is A1, B1, A2, B5, B6,
A4, A5, B9, B11, A6, A7, A8.

In the real case, the project manager is order to shorten the implementation time, in the interest of gaining more the market’s share.
In our case, the list of activities could be ‘crashed’ by spreading the amount of budget.
List of changeable activities:

Code

of Original time

Crashed time

Additional cost

Activities

(weeks)

(weeks)

A3

5

3

2200

A4

6

3

3900

A7

6

4

7000

B2

10

8

3200

B5

4

3

1700

B6

4

3

3000

Question 3
What is the cheapest way to shorten the project duration by four weeks? Five weeks? Six weeks?

The only