Question

1. Do the following crashing problem “from scratch”

1. Develop the time reduction and cost per unit time columns in the table. Units: Time is in days, cost is in $.

Activity	Immediate predecessor(s)	Time	Cost	Crash Time	Crash Cost	Time Reduction	Cost to Crash
A	--	10	5000	10	5000
B	A	12	1200	11	1300
C	A	11	3600	9	4800
D	B	5	300	4	600
E	C	8	1000	6	2000
F	E	9	2400	7	5400
G	D, F	8	700	7	1000

YOU HAVE A NEW DEADLINE OF 39 DAYS TO COMPLETE THE PROJECT.

Show your work for at least the first two cells in each column

2. What are the DVs ? (remember NUN!)

3. What is the objective function? Use dimensional analysis for at least the first two summands.

4. On the next page, draw the network diagram, filling in the appropriate values for activity times  and earliest start and finish as done in class.  Please keep in portrait mode for Canvas grading

5. Write the constraints below.

6. Run the program in solver. Include your excel file with the solver setup and solution.
7. What is the minimum cost?

8. By how much time is each task reduced?

1. What is the total project time?

Answer 1