Arena Simulation

1. Mahidol University
Asst. Prof. Dr. Waressara Weerawat
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Faculty of Engineering
JC Bakery Simulation
2017-2018
Student: Socheat Veng

2. Content
I. Project description
II. Objective and KPI
III.Scenario and comparing
IV.Discussion and Conclusion
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3. I. Project description
• JC Bakery produces 3 types of breads such as Rye Bread, Poppy seed Rolls, and
Rye-wheat Bread
• This bakery has only one production line for producing these 3 differences type of
bread
• The production line of bakery system consists of 10 processes such a: Process
Load Powder to Mixing Machine, Mixing process, Process Unload Powder from
Mixing Machine, Forming Process, Fermentation process, Process load Bread to
Baking Machine, Baking process, Process Unload Bread from Baking Machine,
Cooling process, and Packaging process.
• The current situation is that this bakery spends very long time and less
productivity; the workers are not so busy during working time. One more thing is
that the demand of bakery is increase, so we want to improve productivity of the
product.
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4. Baking Process
Mixing Process
Fermentation
Process
Forming Process
Packaging Process
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Ready Production
Cooling
Process
Model Layout of JC Bakery

5. Conceptual Flow
Fermentation
Entity 2
Baking Process
Ready
Production
Forming Process
Entity 1
Entity 3
Mixing Process
Process Load
Powder to
Mixing Mc
Process Unload
Powder from
Mixing Mc
Process Load
Bread To
Baking Mc
Process Unload
Bread from
Baking Mc
Packaging
Process
5
Cooling Process

6. P1= Process
Load Powder to
Mixing Mc
P7= Steaming
Process
P9= Cooling
Entity 2
P7= Baking
Process
Ready Production
Fermentati
on for
what?
Forming
by what?
P4= Manual
Forming
P4= Machine
Forming
P5= Retarder
P5= Proofer
Baking or
steam?
Entity 1
Entity 3
P3= Process
Unload Powder
from Mixing Mc
P2= Mixing
P6= Process
Load to Oven
P6= Process
Load Powder to
steam
P8= Process Unload
from Rack Oven
P8= Process Unload
from Steam Mc
Entity 1
Entity 2, 3
Entity 3
Entity 1, 2
Entity 1, 2
Entity 3
1 Entity = 5kg can produce 100 breads
6:00pm
6:10pm
6:25pm
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P10= Packaging
Conceptual Model

7. Summary Necessary Information
Entity schedule
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Entity ID Entity name Start time Arrival
time(minute)
Entity 1 Rye Bread Powder 6:00am Constant (40)
Entity 2 Poppy seed Rolls Powder 6:10am Constant (40)
Entity 3 Rye-wheat Bread Powder 6:25am Constant (40)

8. Summary Necessary Information
Process
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Process ID Process Name
Processing Time
Entity 1 (Minute)
Processing Time
Entity 2
(Minute)
Processing Time
Entity 3
(Minute)
P1 Load Powder to Mc TRAI (1,2,4)
P2 Mixing Process UNIF (5,10)
P3 Unload Powder from Mc TRAI (1,1,3)
P4 Forming Process UNIF (30,40) UNIF (10,15) UNIF (10,15)
P5 Fermentation Process UNIF (10,15) UNIF (10,15) UNIF (25,30)
P6 Load Bread to Backing Mc TRAI (2,3,4)
P7 Backing Process CON (20) CON (20) CON (23)
P8 Unload Bread from Backing Mc TRAI (1,1,3)
P9 Cooling Process UNIF (10,15)
P10 Packaging Process UNIF (10,15)

9. Summary Necessary Information
Process-Resource
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Resource ID Resource name Capacity
R1 Load Unload Operator 1
R2 Mixing machine 2
R3 Forming Staff 1
R4 Forming machine 1
R5 Proofer Machine 1
R6 Rack oven 2
R7 Tunnel oven 1
R8 Packer 2

10. Summary Necessary Information
Resource
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Process ID Process name Resource ID
P1 Load Unload Operator R1
P2 Mixing machine R1
P3 Load Unload Operator R1
P4 Forming Staff R3
P4 Forming machine R4
P5 Proofer Machine R5
P6 Load Unload Operator R1
P7 Rack oven R6
P7 Tunnel oven R7
P8 Load Unload Operator R1
P9 Cooling No

11. Summary Necessary Information
Schedul
The official schedule’s working is from Monday to Sunday. They start
working from 6:00AM until 11:00AM and from 1:00PM until 4:00PM.
For a small break, all workers are given 15 minutes break after they
work first 2 hours, and break 1hour break for lunch time after work 4
hours, then break 15min after work 6hours and 8hours.
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12. II. Objective and KPI
• Objective : The objective of this project is to increase the production
output of the JC bakery by changing the time sequence of the entity
and share the resource
• KPI:
Production output
Utilization of former-packer, and forming staff
Total cycle time
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13. Arena Model
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14. III. Scenario and comparing
Scenarios to Compare
In this project, there are 3 scenarios to compare:
Scenario 1: It is the initial model.
Scenario 2: We change the arrival time of the entities that enter into
the process.
Scenario 3: We change the arrival time of the entities that enter into
the process, and also share the resource of packer of the packaging
process to help the forming staff in the process manual forming.
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15. III. Scenario and comparing
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• Below is the schedule of scenario 2 and Scenario 3
Entity ID Entity name Start time Arrival time(minute)
Entity 1 Rye Bread Powder 6:00am Constant (30)
Entity 2 Poppy seed Rolls Powder 6:10am Constant (30)
Entity 3 Rye-wheat Bread Powder 6:25am Constant (30)

16. For Scenario Comparing, we chose the 3 responses according to our
KPI, such as the number out of all entity out, the Average total time of
entity, and utilization of forming staff and former-packager.
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III. Scenario and comparing

17. Result from comparing scenarios
For comparison the entity output or production output, for the
scenario 2 is the best
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18. Result from comparing scenarios
For Comparison the utilization of the former-Packer and forming staff,
the scenario 2 is the best, because in scenario 2 the total utilization of
the resource former-packer and forming staff is higher.
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19. Result from comparing scenarios
For Comparison total average processing time for all entity, the
scenario 3 is the best.
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20. According to these two KPI compare scenarios, we can see that
only the scenario number 2 that is the best one. Because we want to
increase the production output and increase the utilization for the
resource. One more thing is that, the total average processing is higher,
it means that our system is not much idle and not waste the time for
working process.
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Result from comparing scenarios

21. Summary Result from Each KPI
Production output
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IV. Discussion and Conclusion
Entity output Scenario1 Scenario 2
Entity 1 9.96 11.01
Entity 2 10.13 12.92
Entity 3 8.22 10
Total 28.31 32.93

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For 1 of all entity could produce 100 breads, so the total bread of
this three kind are:
Scenario1: Entity (1 + 2 + 3) = 28.31 × 100 =2831 breads
Scenario2: Entity (1 + 2 + 3) = 32.93 × 100 =3293 breads
IV. Discussion and Conclusion

23. Utilization of former-packer, and forming staff (%)
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Resource Scenario1 Scenario 2
former-packer 0.64 0.66
forming staff 0.774 0.811
IV. Discussion and Conclusion

24. • Total processing time(Minute)
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Entity output Scenario1 Scenario 2
Entity 1 156.690 mins 187.394 mins
Entity 2 122.070 mins 136.60 mins
Entity 3 152.651 mins 174.138 mins
III. Discussion and Conclusion

25.  According to the data analysis above, it shows that the scenario 2 is the best
one that could answer to the objective such as the increasing of number
output of entity1, entity 2, and entity 3.
 The utilization of the resource is increasing for the bottle neck process, so
the productivity will be increase.
 For the average total cycle time of entity is increase, it means that the
processing time for our process is increase that it is the way to reduce the
waiting time of the process.
 Thus, the scenarios 2 could be apply to get more production output and also
increasing the utilization of the resource they not free much that could give
the advantage to the bakery, so we choose the scenario 2 for applying to
achieve the objective
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IV. Discussion and Conclusion

26. IV. Discussion and Conclusion
In conclusion, for JC bakery that have the problem with the
demand increase, idle time, and production output is not much, they can
use the scenario 3 which change the time interval of the entity and share
the resource to help the bottleneck process, that the production out hut
increase from want increase the production output for solving the
problems of demand increase from 2831 breads to 3293 breads per day.
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