How to calculate line efficiency while performing several styles in a day.
Calculate line efficiency while performing several styles.
Style will change whenever the order qty/knitted qty will finish at first machine and gradually will feed one by one machine as per new style layout. It is natural, not in a sudden. Sometimes line output end of the day only old style. Sometimes it may 20% of new style and 80% output of old style. Or 2/3 styles can be for short quantity. On the other hand, SMV of every style will not same due to different workload/work content. So what will I do to calculate efficiency when several styles are running a line in a day & every style have output with different SMV?
Whatever line output only a single style or several styles, efficiency calculation formula is always same.
Efficiency calculating equation = (Day total Output*SMV*100)/(Total working hours*60)
Or, Efficiency =(Total output hour ÷ Total input hour)*100
Or, Efficiency = (Sum of SAH ÷ Input Hour)*100
So for the different SMV, how can we calculate it?
For example: If line A produce 350 pieces of style X with SMV 16.50 and produce 250 pieces of style Y with 19 SMV at 10 hours using 20 team members then what will be efficiency of that line?
Efficiency =(Total output hour ÷ Total allocated hour)*100
Here output hour for style X = (350*16.50) ÷ 60
=96.25 Hour
And for style Y = (250*19) ÷ 60
=79.17 Hour
So, Total output hour = 96.25+79.17
=175.42 Hour
And Input Hour = Manpower*Working Hour
= 20*10
= 200 Hour
So efficiency of that line = (175.42 ÷ 200)*100
= 88% ( 87.71%)
This way we can calculate efficiency of a particular line and total Factory Efficiency. We can get better understanding about how efficiently a line or total factory are performing by measuring and maintaining efficiency report. Click to know more about Useful Formula of IE Department.
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