Question
on a Thursday, Dave decided that he would like to have a dinner party for a few of her colleagues and was wondering if sunday
on a Thursday, Dave decided that he would like to have a dinner party for a few of her colleagues and was wondering if sunday was a feasible day to have the party or not. She wanted to get an idea of how many hours of work she would need to do to make a fancy dinner ready by 6 PM on Sunday. He decided to create a project network based on the activities she thought were essential for doing this. We had helped him to identify the critical path by creating a project network and activity schedule. Now, Dave realizes that she has another project that needs to be completed by Sunday and wonders if he can "outsource" some of his activities by paying someone else to do them, since he only has a total of 8 hours available now instead of her original 12 hours of availability. His normal costs and crashing costs along with the crashing time are given in the table below. He wants to minimize her costs, so running a crashing LP model is her best option.
Activity | Description | Time | Normal | Crashing | Crash | |
Immediate | (hours) | Cost | Time | Cost | ||
Predecessor | Ti | Ci | Ti' | Ci' | ||
A | Choosing dishes/recipes | -- | 2 | 100 | 0.5 | 150 |
B | Inviting and confirming # of people | -- | 2 | 100 | 0.5 | 150 |
C | Making ingredient list | A | 1 | 45 | 0 | 100 |
D | Making shopping list | B, C | 1 | 45 | 0 | 100 |
E | Going for shopping | D | 2 | 100 | 0 | 300 |
F | Making the meal | E | 5 | 250 | 0 | 750 |
G | Setting the Table | F | 0.5 | 10 | 0.25 | 50 |
Crashing Model and don't forget to show the updated PERT/CPM model along with the crashing model in your spreadsheet. Answer the following questions:
- Jeanie's total cost of crashing is ______________$
- The activities that Jeanie needs to crash are:
- Activity _______ by_________ hours
- Activity_______ by__________ hours
- Activity________ by __________ hours
- Activity________ by__________ hours
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