Additional sample questions solution:
1) Assuming task 1 is producing item 1, task 2 is producing item 4, task 3 is producing item
5, task 4 is producing item 6, task 5 is producing item 7.
Big bucket:
Minimize z t 1 i 1 cit Qit Ait Yit t 1 r 1 hrt I rt
T
2.4
This satises all the assumptions of the EOQ model. The only nicky thing is to keep the units
consistent.
G0
D = 60 units: wk x52 wklyr = 3120unitslyr
l: I it: = 0.25fy1' X $0.02 = $0.005I'y1'
A = $12
. 'ZAD 2x12><3120
Q = = =3869.SSE3370
it 0.005
The
IE 5551
HW 3
1. Problem 15, 17 Chapter 2 (Factory Physics).
2. Solve question (a) of Problem 9, Chapter 2 (Factory Physics); use holding cost ht = 1.
3. Formulate problem 9 as a mixed integer linear program (MILP).
4. Draw the corresponding network and co
8.1
(a) The mean is 5 and the variance is Ill The coefcient ol'variation is also zero. These preeess times
eotdd be from a highly automated maehine dodieatod to one product type.
{b} The mean is 5, the standard deviation is DJ 15 and the CV is 11.023. The
IE 5551 Midterm Solution
4)
FFTFFFFFT
5a)
We want to find the smallest Q s.t. P( D Q) 0.85.
Since demand D is equally like distributed among 31, 32, , 50, we have
P( D x)
5b)
1
, for 31 x 50. Therefore we get Q 47.
20
Now, P( D Q ') 0.95 Q ' 49.
Q Q ' Q
IE 5551 Midterm Sample
1 Describe causes of the causes of the Bullwhip eect. How could they be addressed? Which type of rms is particularly vulnerable to the bullwhip eect? (10 points) 2 When is postponement (delayed product dierentiation) particularly us
Name:
IE 5551
Final Sample
1) What are the key principles advocated in the book Lean Thinking? (10 points)
2) What is the major lesson you learned about managing factories from reading the book
The Goal. (10 points)
Name:
3) The arrival rate to a machinin
2.4
This satises all the assumptions of the EOQ model. The only nicky thing is to keep the units
consistent.
G0
D = 60 units: wk x52 wklyr = 3120unitslyr
l: I it: = 0.25fy1' X $0.02 = $0.005I'y1'
A = $12
. 'ZAD 2x12><3120
Q = = =3869.SSE3370
it 0.005
The