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Production Line Cookies 1 2 3 4 5 Chocolate mint 30 18 26 17 15 Peanut butter 23

ID: 436186 • Letter: P

Question

Production Line

Cookies

1

2

3

4

5

Chocolate mint

30

18

26

17

15

Peanut butter

23

22

32

25

30

Shortbread

17

31

24

22

29

Fudge delight

28

19

13

18

23

Macaroons

23

14

16

20

27

Sunshine house received a contract this year as a supplier of girl scout cookies. Sunshine currently has five production lines, each of which will be dedicated to a particular line of cookies. The production lines differ by sophistication of the machines, site, and experience of personnel. Given the following estimates of processing times in hours, assign cookies to lines to minimize the sum of completion hours.

Production Line

Cookies

1

2

3

4

5

Chocolate mint

30

18

26

17

15

Peanut butter

23

22

32

25

30

Shortbread

17

31

24

22

29

Fudge delight

28

19

13

18

23

Macaroons

23

14

16

20

27

Explanation / Answer

Let I be the set of Cookies, I ={CM,P,S,F,M}
Let C be the set of productionLine, C= {1,2,3,4,5}

Let xij = 1 if cookie i is assigned production line j, where i belongs to I and j belongs to C
= 0 otherwise

Let tij be the time spent by cookie i on chore j and the data is given in the question

Our objective is to minimize the total completion time on processing


Minimize total completion time i,j (xij * tij)


subject to

Constraint 1: Each cookie i should be assigned only to one production line j

jxij == 1 for each cookie i belongs to I

Constraint 2: Each production line j should be assigned to only one cookie i

ixij == 1 for each production line j belongs to J

Constraint 3: Binary constraint xij belongs to {0,1}

Solving the above optimization problem will give an assignment problem, we get

Chocolate mint -PL 5

Peanut butter - PL 4

Shortbread - PL 1

Fudge delight - PL 3

Macaroons - PL 2

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