What is Takt Time?
Takt Time is the rate at which a product must be produced to meet customer demand.
How do you Calculate it?
Takt Time = Net Available Time/Customer requirement.
When to use it?
• When planning production;
To minimise inventories
To prevent overproduction
To create flow
When planning pull systems
What does it achieve?
• Balance of production with customer demand
• Prevent overproduction
• Minimise inventory
• Understand the Customer Demand
• Determine the Net Available Time to produce the product
• Divide Net Available Time by the Customer Demand
• Round the result up by less than 5% to allow a margin of comfort
As an example; if you have a total of 8 hours in a production shift, (gross time) less 30 minutes for lunch, 30 minutes for breaks (2 x 15 mins), 10 minutes for a Team Brief and 10 minutes for basic Operator Maintenance checks, then;
Gross Available Time = (8 hours x 60 minutes) = 480 minutes
Net Available Time to Work = 480 – 30 – 30 – 10 – 10 = 400 minutes.
If Customer Demand was say, 400 units a day and you were running one shift, then your line would be required to spend a maximum of one minute to make a part in order to be able to keep up with Customer Demand.
In reality, people can not maintain 100% efficiency and there may also be stoppages for other reasons, so allowances will need to be made for these instances, thus you will set up your line to run at a proportionally faster rate to account for this.