Let us start with the mathematical formula:
Takt Time = Time you have / Piece to produce in that time
- Pitfall 1 - You think to have deeply understood how to use it
- Pitfall 2 - You consider the Takt Time not so important.
Warning!
The Takt Time is one of the first steps of the Lean Journey!
If you do not understand it into details you can risk a big fail!
I think now you have understood that Takt Time has to be taken seriously.
Right?
If yes, let us start with a very easy quiz for Takt Time calculation.
A company of chairs has to produce 1000 chairs in 5 working days.
Every working day is of 420 minutes.
What is the Takt Time for the company?
A) 420 minutes
B) 2.1 minutes
C) 2.38 minutes
Wrong Answer –> Try Again.
Correct!
420 minute * 5 Days = 2100 minutes
2100 minutes / 1000 chairs = 2,1 minutes
Wrong Answer –> Try Again.
Were you right at the first shot? Try again.
A company of cars has to produce 2000 cars in 20 working days.
Every working day is of 420 minutes.
What is the Takt Time for the company?
A) 4.2 minutes
B) 42 minutes
C) 420 minutes
Correct!
420 minute * 20 Days = 8400 minutes
8400 minutes / 2000 cars = 4,2 minutes
Wrong Answer –> Try Again.
Wrong Answer –> Try Again.
After this quiz, I would like to share with you
other 3 resources that will help you to stick in mind the formula.
Start from that and then I will explain to you why and how to use the Takt Time.
3 Resources for Takt Time Calculation
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Why use the Takt Time?
To explain why to use the Takt Time I will propose you a video.
This video is one of the best I found for you on this subject.
Moreover, it explains even the difference between:
- Takt Time
- Cycle Time
- Lead Time
It is a little bit long but is
a must see video.
Now,
I think you have understood how to calculate Takt and how to use it!
It is very simple when you have dedicate machines and one piece flow.
But, to have a real benefit you should be
able to use it in a more complex situation:
The operation is in batch.
Commonly ovens, paintings etc.
More than one value stream in one operation.
Product A and Product B go into a single machine.
More machines for one operation.
Product A can be done on two machines in parallell.
A mix of the previous situations.
For each of the three situations, I have prepared for you some exercises.
You can download, print and study.
It helps to understand.
Use them as building blocks of the situation you are facing.
Then,
you will be prepared to evaluate the Yamazumi Chart.
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Other Posts on Takt Time
Here I would like to address you to some posts
I found high quality about Takt Time.
In his blog, the Prof. Roser explains:
- Why do we need Takt Time
- How to calculate the customer Takt
- and more ...
In another post, he gives us the warning to avoid the pitfalls of Takt Time.
Here an image and the link of the
Conclusions
Takt Time is a simple formula
It is just a ratio.
Has to be deeply understood
If you go fast on that you can risk a big failure.
Focus on complex situation
To calculate Takt in a complex situation has to be addressed carefully.