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The Trouble with Calculating Takt Time and Kanbans
At first glance, the formulas seem so easy.
Takt Time =
Work Time Available / Customer Demand
# Kanbans =
Reorder Point rounded to container size
So why are they so often calculated wrong?
Try this experiment...
Ask 5 of your people
to calculate takt time for the same process.
In most organizations,
you will get at least 3 different answers.
Why?
Units of Measure
Does that formula use daily demand?
weekly? monthly?
Work Time Available
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Jack deducted time for set-ups and change-overs. Jill deducted time for the daily Stand Up Meeting. Jim didn't realize that this team has a different break schedule than most other teams. The new-hire, John, didn't even deduct lunch.
Demand
Jack just blindly plugged in the number he got from his supervisor. Jim got the math wrong when converting monthly demand, trying to factor in the consideration that this team will be working every other Saturday next month. Jack was the only one who remembered to include multiple sources of demand (like spare parts, service parts, prototypes...)
Benefits of your Systems2win Takt Time Calculator
- It correctly handles units of measure
- It reminds you to consider all factors that affect Work Time Available
- It allows you to (optionally) consider multiple sources of Demand
- It calculates Pitch (which experienced lean workers care about more than Takt Time)
- You have a written archive to clarify "Where did that number come from?"
- With the click of a button, you can instantly add a Takt Time Calculator sheet to ANY Excel document
- It comes with training
(so that all of your people calculate Takt time in one standardized consistent way)
And perhaps best of all...
It's free
Yes, there is no trial expiration on this template.
So when you download the latest free trials,
you can keep and use this Takt Time Calculator template for the rest of your career - as a free gift.
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