› › resource › collection › ... Lessons for production management for MTO Using …•...
Transcript of › › resource › collection › ... Lessons for production management for MTO Using …•...
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1© 2014 TOCICO. All rights reserved.
TOCICO 2014 Conference
Lessons for production management for MTOUsing G-Sim Simulator
Presented By: Oded CohenDate: 9th June, 2014
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Contents
Introduction to GSim
Plant 10 – the base line
Using GSim for MTO Planning
Conclusion
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Introduction
The Goldratt Simulator (GSim) was built by Eli Schragenheim in 1986 on the base of the computerized OPT game that he developed in 1984. The GSim played a significant role in educating generations of Jonahs and TOC managers around the world
The objective of this workshop is to re-introduce the Gsim to the TOC community and to show how it can be used for transferring the most updated TOC knowledge for managing MTO production and operations.
The workshop will present how to use the GSim for transferring the understanding of how to manage MTO environment using the TOC injections.
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• Introducing GSim• Run #1 – managing the intuitive way• Analyzing Run #1 - Introducing MTO Injection-1• Preparing for the 2nd run• Run #2• Analyzing Run #2 – Introducing Injection 2• Run #3• SummaryAdditional Workshops:• Managing Execution the TOC Way – Injections 3,4, 6,7 (and 8
when applicable) – using GSim • Material Management - MTO Injection #5 (not supported by
GSim)
Using Gsim for MTO PlanningOverall structure of the Planning Workshop
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Instructions to the program participants:
•Turn to your PC
• Open Gsim folder
• Click on Gsim – the program
• Select params.10
Starting the Simulator
GSim can be obtained by purchasing
Production the TOC Way
by Goldratt & Schragenheim
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The Flows of a Commercial Business
Process flow $Goal units
Management / Workforce
The Goal: To make money now and in the future
Gsim provides a system with the three flows
InformationFlow
DecisionsFlow
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• 3 products - the customers are prepared to order:A - 40 units @ $180 eachD - 80 units @ $240 each F - 40 units @ $180 each
• There is some WIP • 5 types of resources - 8 Full Time Employees/Machines• Materials to be purchased (released) for production. Need to pay cash. (A-$30, C-$35, E-$30, F-$65)• The is amount of money in the cash.• Customers pay cash upon delivery• You are the management team • Only time and profit have to be managed - quality is a given• Your assignment is to achieve a target profit (>$4000) and deliver units on time.
Gsim - The “Paradise System” – Plant 10
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Week: 1Day: 1
Time: 00:00
Cash:2500
Fixed Exp:11000
Pace: 1
FREEZE
setup
15
120
60
0
30
0 -idle
-idle
-idle
-idle
-idle
-idle
-idle
-idle
0150
40
100
120
140
2010
70
4
40
0
050
0
180
825
150
60
150200
90
0
80
60
280
2015
90
A B C D E F G HRM
1
2
3
4
5
6
7
8
9
DemandA D F
8
Machines/Resources
Process Flow
Plant 10
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Week: 1Day: 1
Time: 00:00
Cash:2500
Fixed Exp:11000
Pace: 1
FREEZE
setup
15
120
60
0
30
0 -idle
-idle
-idle
-idle
-idle
-idle
-idle
-idle
A B C D E F G HRM
1
2
3
4
5
6
7
8
9
Demand $180
$30
0
$35
0
0
25
0 0
0
0
$65
0
$30
0
$180
0$240
0
0
00
10
15
00
A D F
9
INFO ScreenFinancial Data
INFO Plant 10
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This is one resource with 120 minutes set up
Job/Step A1 is processed by the GREEN m/c and each unit takes 4 minutes to be processed
The GEEN m/c was assigned to perform job A1
10 units of RM A were purchased (released to production)
120 -idle
4
ARM
10
0
120 A1setup
+4
ARM
10
0
+4
ARM
110
0
Gsim – The Plant – Resources/Machines
Information Flow - Data is available and accurate
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GSIM – Plant 10 – Run #1
The group is split into teams of 2. 20 minutes are given for planning the production for a
week.Run #1 is done under the guidance of the tutor.Pace: day 1 – pace 1, day 2 – pace 2, day 3-5 – pace
3.By the end of each day – accumulative Throughput
should be recorded by each team.By the end of the simulated week:Recording the performance on the result sheet.
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Gsim – Assigning Resources and Purchasing
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Gsim – End of the Day (days 1-4)
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Gsim – Managing the Flow during the Week
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Sim 10 Throughput RUN #1
Group Day 1 Day 2 Day 3 Day 4 Day 5 OE NP
1 1150 1150 4600 7150
2 690 3795 4600 13460
3 1015 3480 4975 6010
Average 952 2808 4725 8873
Link to excel file
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End of the Week Results – Plant #10 – Run #1
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Gsim – Recording the Flow during the Week
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Sim 10 Throughput RUN #1
Group Day 1 Day 2 Day 3 Day 4 Day 5 OE NP
1 1150 1150 4600 7150 10140 11000 ‐860
2 690 3795 4600 13460 16450 11000 5450
3 1015 3480 4975 6010 13200 11000 2200
Average 952 2808 4725 8873 13263 11000 566
NP = T – OENP = Sales - RM – OE
RM is calculated only of the goods sold!Link to excel
file
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GSIM – Plant 10 – Run #1 - Analysis
Production Management –plan and execute
The objective –OTIF – On Time In Full
DDP – Due Date Performance should be major measurement for the production environment.
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PER
FOR
MA
NC
E
CURRENT LEVEL
TARGET LEVEL
The GAP
NP = 4000
Has the target NP been achieved? What was DDP?
Let’s implement the TOC solution!
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DD D’D’
CCBB
A A
TOC InjectionsTOC Injections
TOC Direction of the Solution
Low Performance Measurements
Low Performance Measurements
UDE
UDE
UDE
UDEUDE
UDE
High Performance Measurements
High Performance Measurements
DE
DE
DE
DEDE
DE
TOC direction of solution
TOC direction of solution
NBRs
PIVOTTOC
Cur
rent
Rea
lity
Futu
re R
ealit
y
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The TOC Pivot
Managing the TOC Way:
• The Basic Assumptions• The Flows within the system• The Constraint• Types of Constraints• Managing through the Constraint• The Five steps of Focusing
PIVOTTOC
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Step 1 - Identify the constraint of plant 10: The Primary Constraint is determined by the potential amount of
customers’ orders (COs) the plant can get (NP=9,800) Secondary Constraint is Capacity. Perform load analysis
Step 2 – Decide how to exploit the system constraint: Deciding on the product mix Building a delivery plan (determining delivery dates)
Step 3 – Subordinate Planning the release Work Orders (WOs)
These steps are incorporated into the TOC Solutions for MTO
The TOC Pivot – Managing ConstraintsUsing the 5 Steps of Focusing for Planning
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The MTO Solution
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Tactics: The Operations (Production) implements S-DBR and BMto achieve a very high Due Date Performance
Immediate improvements in DDP
Due Date Performance
Injections 2-5
Continuous improvement
POOGIProcess of Ongoing
Improvement
Injections 6-8
TOC Solution for MTO
Injection 1
Achievement of the delivery commitments is established as a Prime Measurement for
the production area
Mindset:Customer orders are the
Prime Driver for managing Operations
(Production)The Drum
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Injection 1 Achievement of the delivery commitments is established as a
Prime Measurement for the production area
Injection essence
DDP the prime measurement.A critical prerequisite is planning of the promised delivery to the customers.The Delivery Plan is the DRUM.
DD2DD1
Inj 1 - DRUM
NOW DD3 DD4
Time
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Preparing for Run #2
Let assume that Sales and PPC have agreed on the weekly delivery to the clients:
This delivery plan:• Brings value of over 5000 NP (?)• Is realistic (check)• Risky?
Product Quantity DD - HourF 10 8A 10 10D 15 12F 30 20A 30 28D 35 38
Injection 1 Achievement of the delivery commitments is established as a
Prime Measurement for the production area
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Preparing for Run #2
PPC has to convert CO - Customers’ Orders into WO – Work OrdersFor simplicity – let’s assume every CO has one Work Order
Product WO # Quantity DD - Hour MaterialF WO1 10 8 WIPA WO2 10 10 WIPD WO3 15 12 WIPF WO4 30 20 F-30A WO5 30 28 A/C – 30D WO6 35 38 A/C/E - 35
Injection 1 Achievement of the delivery commitments is established as a
Prime Measurement for the production area
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Preparing for Run #2 – Recording the flow of WOsProdu
ctWO # Q DD -
HourMaterial Actual
releasedQ
on timeWO
completedDDP LoS
F WO1 10 8 WIP ---
A WO2 10 10 WIP ----
D WO3 15 12 WIP ----
F WO4 30 20 F-30
A WO5 30 28 A/C –30
D WO6 35 38 A/C/E -35
Injection 1 Achievement of the delivery commitments is established as a
Prime Measurement for the production area
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• Restart GSim plant 10• Agree on the roles of each member of the team• Prepare the documents for recording • Start the run. Day 1 – pace 2. Day 2-5 – pace 3.• Record: Release time of WO Quantity delivered at the planned DD If WO is not completed – record the completion time Calculate LoS – Length of stay
• Record end of the week results. Calculate DDP.
Instructions for Run #2
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Gsim – Results – Plant #10 – Run #2
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Results graph run #1 and #2 PE
RFO
RM
AN
CE
TOP SCORE
NP = 4000
RUN #1
RUN #2
Lessons to be learntWhat was blocking you now???
Record & Discuss
Record also the Graph of DDP
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Preparing for Run #3
Do you want to make any changes to the Shipping Schedule?Make the changes.
This delivery plan:• Brings value of over 5000 NP • Is realistic• Risky?
Product Quantity DD - HourF 10A 10D 15F 30A 30D 35
Injection 1 Achievement of the delivery commitments is established as a
Prime Measurement for the production area
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Injection 1 - Preparing for Run #3 Introducing the delivery plan to the “System” - GSIM
Open the planning window
Record the delivery of the “free” products
Check using: Show Shipping Timing
Save the commands file
Commands.10-1
TICK OFF – the restricted before OK
1
2
3
4
5
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The Operations (Production) implements S-DBR and BMto achieve a very high Due Date Performance
Immediate improvements in DDP
Due Date Performance
Continuous improvement
POOGIProcess of Ongoing
Improvement
TOC Solution for MTO
Mindset:Customer orders are the
Prime Driver for managing Operations (Production)
The Drum
Injection 2Production Buffer (PB)
is set to bechallenging but
achievable, with Raw Materials released
accordingly
Injection 3Work Orders (WO)
sequenced according to buffer status through
the use of Buffer Management
Injection 4BM - Buffer
Management for recovery
actions isin place
Injection 5Availability of the
selected critical Raw Materials (RM) and
components is monitored/managed
Planning Planning & ExecutionExecution Control
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Injection 2 Production Buffer (PB) is set to be
challenging but achievable, with Raw Materials released accordingly
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Injection 2 introduces the concept of the Production Buffer (PB) –what it is and how it is used for managing the production flow.
The injection contains :
1. The definition of Production Buffer (PB)
2. Time status of the PB
3. The size (length) of the PB
4. Material Release – the signal to start working on the order
Injection 2
Injection essence
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The time for the raw material release is given determined by the start time of the Production Buffer.
The length of the Rope equals the length of the Production Buffer
Injection 2Production Buffer (PB) is set to be challenging but achievable, with Raw Materials released accordingly
Material Release – the signal to start working on the order – The Rope
Production Buffer - PBMaterial Release
Time
DD
NOT EARLIER!!
Rope
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Determining the size (length) of the PBInputs: 1. QLT/ Current practice (weekly plans)2. LoS statistics3. Routing (back to back) Please note the limitation of the GSim – it can handle only
one size of PB. Hence – do not spend too much time discussing!
Injection 2Production Buffer (PB) is set to be challenging but achievable, with Raw Materials released accordingly
Let’s assume PB = 24 hours
Preparing for Run #3
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The process determines: Material to be released, quantity and timing.• Material – through the BOM• Quantity – using the procedure of “Gross to Net” (mrp)• Timing = CO DD minus PB
Preparing for Run #3 - Material Release
Product WO # Quantity DD - Hour Material Timing
F WO1 10 8 WIPA WO2 10 10 WIPD WO3 15 12 WIPF WO4 30 20 F-30 0 (20-24)A WO5 30 28 A/C – 30 4 (28-24)D WO6 35 38 A/C/E - 35 14 (38-24)
Injection 2Production Buffer (PB) is set to be challenging but achievable, with Raw Materials released accordingly
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TOCICO 2014 ConferenceIntroducing injection 2 to the “System” - PB
Open the planning window
Load the command file
Introduce PB – called “Shipping Buffer”
Preparing for Run #3
1
23
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Introducing injection 2 to the “System” – Material Release – using the ROPE
Press the “Rope”Observe the
“Purchase” schedule
TICK OFF – the restricted before OK
Do not use the AUTO Feature!!!
1
2
3
Preparing for Run #3
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Preparing for Run #3 – Recording the flow of WOs
Product
WO # Q DD -Hour
Material Actual released
Qon time
WO completed
DDP Los
F WO1 10 8 WIP ---A WO2 10 10 WIP ----D WO3 15 12 WIP ----F WO4 30 20 F-30A WO5 30 28 A/C – 30D WO6 35 38 A/C/E - 35
Injection 2Production Buffer (PB) is set to be challenging but achievable, with Raw Materials released accordingly
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• Restart GSim plant 10• Agree on the roles of each member of the team• Prepare the documents for recording
What will be different?• Once you start the simulator – material will be released
according to the plan – time and quantity. You will not need to manually purchase material.
• However – if at the time of release there will not be enough money to buy everything – the available money will be used to buy only some and when more money will come – more will be released.
Instructions for Run #3
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Run: Day 1 – pace 2. Day 2-5 – pace 3.• Record: Release time of WO – was it on as planned? Quantity delivered at the planned DD If WO is not completed – record the completion time Calculate LoS – Length of stay
• Record end of the week results. Calculate DDP.
Instructions for Run #3 (cont.)
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Gsim – Results – Plant #10 – Run #3
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Results graph run #1 - #2 - #3 PE
RFO
RM
AN
CE
TOP SCORE
NP = 4000
RUN #1
RUN #2
Lessons to be learntWhat was blocking you now???
Record & Discuss
RUN #3
Record also the Graph of DDP
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ConclusionTOC Solution for MTO – Planning
The use of GSIM, in a directed way enables the TOC practitioner to enhance the understanding of the injections of the TOC Solution for MTO environment.
The workshop gives the participants the opportunity to grasp the essence of the injection through hands on experience. When dealing with practical examples and numbers – the concepts become more “friendly”.
Many managers tend to leave production planning to their automated system. The perception is that planning is difficult and anyway a waste of time. We can help them realize that planning is simple and worthwhile.
Good planning provides the base for more effective and less hectic execution management.
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The Operations (Production) implements S-DBR and BM
to achieve a very high Due Date Performance
Immediate improvements in DDP
Due Date Performance
Continuous improvement
POOGIProcess of Ongoing
Improvement
TOC Solution for MTO - Planning
Injection 1
Achievement of the delivery commitments is established as a Prime Measurement for
the production area
Mindset:Customer orders are the Prime Driver for managing Operations
(Production)The Drum
Injection 2Production Buffer (PB)
is set to bechallenging but
achievable, with Raw Materials released
accordingly
Planning
Injection 5Availability of the
selected critical Raw Materials (RM) and
components is monitored/managed
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Oded has over 35 years of experience in developing,teaching and implementing TOC methodology, solutions andimplementation processes working directly with Dr. Goldrattall over the world. Among the countries to which Oded bringshis expertise are the USA, Canada, Japan, India, China, theUK, Poland, Russia, Ukraine, Colombia, Chile, Peru, Turkeyand many others.
Oded has authored multiple TOC articles and contributed tonumerous TOC books.
Oded in the is the author of Ever Improve – A Guide toManaging Production the TOC Way, published in June 2010.Oded co-authored the book Deming & Goldratt: The Theoryof Constraints and the System of Profound Knowledge – TheDecalogue.
Together with Jelena Fedurko Oded has co-authored thebook Theory of Constraints Fundamentals.
Oded is International Director of TOC Strategic Solutions Ltdand Founder and Co-President of TOCPA.
Oded Cohen