Manufacturing Operation As A Single System
-
Upload
brendon-mawe -
Category
Documents
-
view
44 -
download
1
description
Transcript of Manufacturing Operation As A Single System
![Page 1: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/1.jpg)
1Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Information flow
Manufacturing Operation As A Single System
OPERATIONOPERATION
OUTPUTOUTPUT(PRODUCTS)(PRODUCTS)
INPUTINPUT(RAW MATERIALS)(RAW MATERIALS)
CONTROL
![Page 2: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/2.jpg)
2Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Information flow
Manufacturing Operation As A Single System
OPERATIONOPERATION
THROUGPUTTHROUGPUT(Products/Time)(Products/Time)WORK IN PROCESSWORK IN PROCESS
(Units of RAW MATERIALS)(Units of RAW MATERIALS)
CONTROL
CYCLE TIME (Time)CYCLE TIME (Time)
LITTLE`S law: TH=WIP/CTLITTLE`S law: TH=WIP/CT
![Page 3: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/3.jpg)
3Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Sources Of Variability In A Single Operation
Machine Failures
Shut downs due to quality problems
Operator´s Off Times
Slow downs due to set ups
Scheduled maintenance
Tardy arrivals of materials
High Work In Process
Priorities
Recycles
Defective materials
Tardy arrivals
Incomplete lots
Wrong lots
VariabilityVariability
![Page 4: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/4.jpg)
4Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Parameters And Variability Interrelationships
WIPWIP
THTH
CTCT
WoWo
VariabilityVariability
![Page 5: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/5.jpg)
5Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Parameters And Variability Interrelationships
![Page 6: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/6.jpg)
6Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Dependency Phenomenon
2
3
4
1 5Raw materialsRaw materials End ProductsEnd Products
MostDependentOperation
![Page 7: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/7.jpg)
7Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Variability And Dependency Phenomenona Affect:
THROUGHPUT (TH)
WORK IN PROCESS (WIP)
CYCLE TIME (CT)
VARIABILITYVARIABILITY DEPENDENCYDEPENDENCY
![Page 8: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/8.jpg)
8Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Bottleneck Effect
1 2 3
r1 r2 r3
r1 = min (r1,r2,r3) is the bottleneck
Even if W increases as infinite,
TH is TH is maximummaximum r1 r1
ri = Production rate (parts/unit time)ri = Production rate (parts/unit time)
![Page 9: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/9.jpg)
9Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Bottleneck Effect
![Page 10: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/10.jpg)
10Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Global Processing Time:To
1 2 3
t1 t2 t3
Global Processing Time To
To = t1 + t2 + t3To = t1 + t2 + t3
ti = Production time (time per unit)
![Page 11: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/11.jpg)
11Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Critical Wip:Wo
To = Global To = Global Processing Processing
TimeTime
Wo = (rb). Wo = (rb). ToTo
rb = rb = bottleneck bottleneck
raterate
![Page 12: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/12.jpg)
12Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Best Performance Law
W/ToW/To, if W < Wo or W =Wo rbrb, otherwise
ToTo, if W < Wo or W =Wo W/rb, otherwiseCtbest =
Thbest =
![Page 13: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/13.jpg)
13Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Worst Performance Law
THworst = { W/(Wo+W-THworst = { W/(Wo+W-1)}* rb 1)}* rb
CTworst = To + (W-1)/rbCTworst = To + (W-1)/rb
THworst = { W/(Wo+W-THworst = { W/(Wo+W-1)}* rb 1)}* rb
CTworst = To + (W-1)/rbCTworst = To + (W-1)/rb
![Page 14: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/14.jpg)
14Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Some Performance Tips
AS WIP INCREMENTS
CT INCREMENTS
TH REMAINS EQUAL OR LESSER
![Page 15: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/15.jpg)
15Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Some Performance Tips
MANUFACTURING PLANNERS
MUST TO KNOW WoWo
IT MEANS THEY HAVE TO KNOW rbrb
BECAUSE Wo = rb.ToWo = rb.To
![Page 16: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/16.jpg)
16Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Some Performance Tips
WIP MUST BE A WIP MUST BE A CONTROL CONTROL
PARAMETERPARAMETER
![Page 17: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/17.jpg)
17Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Some Performance Tips
1. TO CONTROL WIP INSTEAD OF TO CONTROL THROUGHPUT
2. TO CONTROL VARIABILITY
![Page 18: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/18.jpg)
18Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Some Performance Tips
MRP SYSTEMS CONTROL
THROUGHPUT INSTEAD OF CONTROLLING WIP
MRP IS A POWERFUL INFORMATION TOOL
SOME MRP SYSTEMS TREAT TO CONTROL VARIABILITY
![Page 19: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/19.jpg)
19Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Some Performance Tips
![Page 20: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/20.jpg)
20Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Some Performance Tips
![Page 21: Manufacturing Operation As A Single System](https://reader036.fdocuments.us/reader036/viewer/2022062314/568134d8550346895d9c07af/html5/thumbnails/21.jpg)
21Luis Ernesto BLANCO RIVERO "SIMULATION AS A TOOL FOR UNDERSTANDING MANUFACTURING"
Animated Simulation Benefits
STUDENTS MAY OBSERVE AND
ANALYZE MANUFACTURING PARAMETERS WHILE SIMULATION
RUNS
STUDENTS MAY CONSTRUCT STEP BY STEP MORE COMPLEX SYSTEMS
STUDENTS LEARN FACTORY PHYSICS BY DOING SIMULATION