Takt Time - Lean Six · PDF fileTakt time relates the customer demand to the time available....
Transcript of Takt Time - Lean Six · PDF fileTakt time relates the customer demand to the time available....
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Takt Time
Training Pack
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Which of these is Important to Our business?
• Satisfied Customers• Profit• Growth• Market Share• Effective use of its people and plant• Maximum Capacity Production
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Why Not Maximum Capacity?
Producing more than the customer requires is:
This is the greatest of the Seven Wastes
As it leads to occurrence of the other six
OVER-PRODUCTION
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The Western Approach
We produce more than we require to allow for problems
This embeds waste in our business
1 2 3
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‘Push’ Production System
Customer
If we consider production operations as a chain…
Each link producing in isolation at full speed will cause a mismatch between links
Some areas over-produce, some cannot keep up...
?
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‘Push’ Production System
Customer
What will happen when a link in the chain breaksWithin a ‘Push’ System?
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‘Push’ Production System
Customer
The individual links keep building to schedule and…
The chain soon backs up
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‘Push’ Production System
Customer
When we consider the wider system…
We see why stock is present. To buffer the unevenness of work To buffer the breaks in the chain
STOCK / WIP
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Just In Time
Takt TimeTakt Time
JIT
Pull system
Continuous Flow
Processing
Level Scheduling
The Just in Time branch of the
Lean Production System
is constructed of four key
elements
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Takt Time
Takt is a German word
It is the principal that all activity within a business is
synchronised by a pulse, set by the customer
demand
It describes the conductorsbaton
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Takt Time determines;
The pulse of the Production System
•Pace of sales
•Links production activity to actual customer demand
•Ensures all production activity will be synchronisedfrom 1st process to final assembly process. - FLOW
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Takt time relates the customer demand to the time available.
Takt = Production Time AvailableCustomer Demand
Time is deducted for:Lunch and tea breaksTeam briefing timesTPM breaksClean down time
E.g 8hrs x 60 = 480 minutes Time Available = 480 – 20 mins breaks – 10 mins TPM
= 450mins
How To Calculate Takt Time
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If the customer demand is 500 units per week;
Demand = 500 / 5= 100 products a day
Takt Time = Time AvailableCustomer Demand
= 450 mins100
= 4.5 mins or 270 secs
How To Calculate Takt Time
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Takt, Cycle, Target Cycle and Lead Time
Takt Time = The pace at which the customer requires products
Target Cycle Time = The pace at which we will produce to ensure we meet the customer requirements
Cycle Time = The time at which a process cycles
Lead Time = The total production lead time from product start to finish
Don’t get them confused!!
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Takt, Cycle, Target Cycle and Lead Time
Takt Time
Target CycleTime
CycleTime
+ + + + + = LeadTime
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Flow Production
CustomerThe customer takes a product from the end
Of the chainEach link in the chain takes from the previous linkAnd processes produce to fill the gap that has been
created
What will happen when a link in the chain breaks
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Customer
Flow Production
If a link in the chain breaks...The chain stops.
If the Customer does not pull from the end...
The chain stops.
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Takt Time, an enabler for Flow
If work balance is set to Takt, the process closest the
customer can pull production through the system at
the right pace. This includes material delivery.
This pull removes the requirement for scheduling at
each stage, and hence the buffer stocks and Work
In Progress that populate the ‘Push’ Process Chain.
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Takt, an Enabler for Work Balance
Mug Tree
Coffee
Boiler
Fridge
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65
43
7
2
1 Obtain Mug
2 Put Mug DownObtain SpoonPut Coffee in Mug
3 Obtain Milk
4 Put Milk in Mug
5 Return Milk
6 Add Water to MugPick up Mug
7 Place Mug on Table
OPNoNo Work Description
Step Time
Wor
k
Wal
k
C01 2
2
8
22
2
4
2
4
4
214
2 2
3
TOTALS45 1863
3
C03
C05
C02
C04
C06
Return 5
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440 minutes/day X 60 seconds/minute380 products per day
= 66 Secs
The Customer Requires: 380 Mugs of Coffee / day
Time AvailableCustomer Demand
=TAKT TIME
Takt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work Balance
Time Available = 480mins - 30mins breaks - 10mins team meeting
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66 Secs TAKT
Non Value Added
Value Added
C01
C02
C06
C03(Add Coffee)
C04
Add Milk
C05(Add Water)
Takt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work Balance
OpNo
7 Secs2 Secs
8 Secs2 Secs
8 Secs
4 Secs
14 Secs
12 Secs
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Takt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work Balance
How do we use this information to meet ourcustomer demand?
Add 20% more workers?
Run 20% Overtime?
Contract out 76 cups of coffee to a supplier?
Use Takt to drive waste elimination
Customer Demand +20%
380 mugs / day to 456 mugs / day
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380 Mugs of Coffee 440 X 60380 = 66 Secs
TAKT
When Customer requirements change, Takt changes
Takt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work Balance
456 Mugs of Coffee 440 X 60456
= 55 SecsTAKT
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66 Secs
Non Value Added
Value AddedC01
C02
C03
C04
C05
Takt for 380 mugs / day
C06 55 Secs Takt for 456 mugs / day
Takt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work BalanceTakt, an Enabler for Work Balance
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Mug Tree
Coffee
Boiler
Fridge
1
65
43
7
2
1 Obtain Mug
2 Put Mug DownObtain SpoonPut Coffee in Mug
3 Obtain Milk
4 Put Milk in Mug
5 Return Milk
6 Add Water to MugPick up Mug
7 Place Mug on Table
OpNoNo Work Description
Step Time
Wor
k
Wal
k
C01 2
2
8
22
2
4
2
4
4
214
2 2
3
TOTALS 45 1863
3
C03
C05
C02
C04
C06
Return 5
Takt, an Enabler for Work Balance
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Work Balance
Work Package Progress Tracker
A work package progress tracker will be used to monitor how the unit build is progressing against takt and drive corrective action
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Operator
Cycle Time
Takt Time
Task Description Unit Start
dateStart Time Target finish
WORKPACKAGE 1 PACKAGE PROGRESS TRACKER
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Takt Time
Customer
STOCK / WIP
REMEMBER WASTE, ITS DOOM
We know why conventional western methods will make our business unprofitable
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WASTE
Takt Time
Enables work-balancing Enables Flow
Driving out waste within our business