Tact Time Calculation Software

i use excel

first calculate the takt time - how many parts per year

then using how many days / shfts / hours etc are to be used for the production ; determine a part/ min takt time

in excel create a sequence of operations for each process station and each machine or assembly

list the order of operations in each station and whether the work is manual or machine

example

remove part for inj press mach...8

put part on conveyor mach...6

close press and shoot mach...5

cool and open mach...65

pic part with robot mach...8

inspect part man...20

package man...12

as you see the machine determines the cycle andthe operator time "conincides" with the machine -- the machine never waits on the operator or you would have to add that time to the cycle --- here the time for the cell is 92s -- if the requirement were less then maybe you have to have another machine or a shorter cooling cycle, if it is smaller than the takt time then you can run less days

if you assume contiunous flow manufacturing, you use the takt time to find the bottle necks in the sequence of operations to determine the labor and equipment required as well as balance the line side labor ( the operator above can support 2 mirrored IM machines)

if it is an new machine then you have to estimate the time for each step in the sequence either using history and experience or assumptions like 4 ft / 80% robot speed = secs for pick operation etc

essentially each step has to meet the takt time as well as the output of the line

disregard items that coincide or happen in parallel to the process unless they take longer - when longer use that time

hope this is not too confusing and helps

We are Engineers so we should all use the correct terms.

Tact time is the time it takes to produce units to meet customer demand, as demand changes, so does tact time.

What we are talking about here is cycle time, or the time it takes to produce one unit.

Just to keep us all talking the same language.

Hi .

I'm agree with you , others answers where speaking about cicle time.

Tact time has variation depends on the customer demand. And in charge section must decide adjust operations or people in order to work under this tact time target.

Cicle time has no variation if no changes are applied , so , i.e. in a manual line , you must decide balance method for each combination of operators and adjust qty of operators considering customer tact time (UNTIL REACH SOME MACHINE BOTTLE NECK , OF COURSE).

I'm enjoying with this discussion , then Ihave a question , anybody can define correctly "Lead time"?. Process time is needed to include?. If you have a curing process with 5 hours needed , in your company , you include this time?.

Thankyou

TIE