# Lean Question

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- This topic has 5 replies, 3 voices, and was last updated 14 years, 10 months ago by annon.

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- July 19, 2005 at 10:29 pm #40070
How would you calculate Takt time if you have the following:

Daily Demand: 344 units

Available Work Time: 27000 sec

Shifts: 2

Number of dedicated work stations: 3 on first shift, 1 on second shift

THANKS!0July 20, 2005 at 2:07 am #123292

SixSigmaToolsMember@SixSigmaTools**Include @SixSigmaTools in your post and this person will**

be notified via email.Takt time does not care how many stations you have.

Takt time = Available time / Demand

in your case:

27000 / 344 = 78.48 seconds per unit

Question: If you have 2 shifts, then why do you not have 54000 seconds (27000sec. X 2) of available time?

You can calculate the number of operators needed by:

Total Cycle Time / Takt Time

If you have 1 operator per station, this will then tell you how many stations you need.0July 20, 2005 at 4:51 pm #123335Thank you! So the number of existing work stations is a moot point…calculate takt based on AWT (both shifts) and total daily demand for all end items, then calculate the number of operators requried (CT/TT), and then use the operator-to-station ratio to determine the required number of stations in the future state, ignoring the number of work stations in current state….yes?

0July 20, 2005 at 4:51 pm #123336Thank you! So the number of existing work stations is a moot point…calculate takt based on AWT (both shifts) and total daily demand for all end items, then calculate the number of operators requried (CT/TT), and then use the operator-to-station ratio to determine the required number of stations in the future state, ignoring the number of work stations in current state….yes?

0July 20, 2005 at 5:06 pm #123338

6sigmatoolsParticipant@6sigmatools**Include @6sigmatools in your post and this person will**

be notified via email.Your formula for determining the number of operators is correct (assuming that you are in a manual assembly environment).

Takt Time only tells you the rate at which the customer is pulling product. You will then need to determine the number of employees ( or work content per station) in order to meet that demand time. This is what shows the need for “Lean Flow” meaning that the product can not sit in 1 work station more than your defined takt time. If it does, then you will not meet customer demand.

You will probably need to complete a “Percent Load Chart” which tells you cycle time per station compared to takt time.

Supply an e-mail, and I will forward you examples

0July 20, 2005 at 7:03 pm #123349[email protected] Thanks again!

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