# Lean Question

Six Sigma – iSixSigma Forums Old Forums General Lean Question

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• #40070

annon
Participant

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!

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#123292

SixSigmaTools
Member

Takt time does not care how many stations you have.
Takt time = Available time / Demand
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.

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#123335

annon
Participant

Thank 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?

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#123336

annon
Participant

Thank 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?

0
#123338

6sigmatools
Participant

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

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#123349

annon
Participant

[email protected]    Thanks again!

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