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what would be the predecessor activity for J and why? Also how to construct a cpm network diagram.

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12:[email protected]@aii ~ ’OfltlyA45%. >< OPRE6302_Homework_6_F19(1),pdf u. OPRE 6302: Homework Assignment 6 Dorothee H. is going to spend a sabbatical year in Maastricht, the Netherlands during the 2011«
12 academic year. She is planning ahead and preparing everything she needs to do before
leaving. First, she needs to look for a rental agency as well as an international moving company.
At the same time, she needs to do some research to determine in which neighborhood of
Maastricht she wants to live. Once she knows where she wants to live, she’ll have to look for a
daycare in that area for her daughter Elsa. Then she will go on the website of the chosen
daycare to fill in some information about Elsa. Once she has found a rental agency, she will
search in their database for an apartment located in the neighborhood she has chosen. Based
on where the daycare and apartment she picks are located with respect to the train station, she
will decide whether or not she needs a car in Maastricht. She will decide how much to sell at a
garage sale in Austin based on how much space there is in the apartment she has chosen in
Maastricht and the rates of the international moving company she has picked. Whatever does
not sell at the garage sale will be donated to charity. Finally, she will have to fill out a change of
address form (in which she has to indicate her new address in the Netherlands) with the Belgian
government as soon as possible. Normal Immediate ACthltY Duration (weeks) Predecessor(s)
Find rental agency 3
Find international moving company
Do research on neighborhoods in Maastricht C
Find daycare for Elsa D
Fill in information about Elsa online E
Find apartment
Decide if needs a car
Have garage sale H
Donate unsold items to charity |
Fill out change of address form 1 2
4
3
3
4
1
1
1 | (a) Say what are the immediate predecessor(s) of each task is(are) using the above table.
Then draw a network diagram using the activity-on-arcs technique (the one we used in
class). (b) List all the paths in the network diagram. Say which one(s) is(are) the critical path(s). (c) How soon will Dorothee be ready to leave if all the activities have to be completed
before she can leave the US? (d) For each activity compute ES, EF, LS, LF and slack. Then, say which activities are critical. (e) Four weeks into the planning process, Dorothee starts looking for an international
moving company. What is the maximum time this task can take without it affecting the
earliest time she could leave the US? Explain carefully. (f) Dorothee realizes that she needs to leave three weeks earlier. Looking back at her task
list, she has computed the smallest possible duration for each task (crash duration) as
well as the cost of completing each task in its normal duration and crash duration. Crash duration Normal cost Crash cost (weeks) (5) l5)
n—n-fi-
B 2 10 10 Activity

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