What is on-standard efficiency and overall efficiency?

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Efficiency of a line or an individual operator is calculated by using following formula. 


Efficiency (%) = Total minutes produced / Total minutes attended at work*100 

The above formula gives us overall efficiency of the operator or a line. 

Operators, who work in the line whole day attend 480 minutes (shift hours), but they do not always sew garments. Lot of time, operators wait for work due to external reasons or they do off-standard jobs (operations) in the 480 minutes duration. Reasons are like waiting for work, machine break down, power failure, line setting, meeting, non availability of trims and accessories. All these off-standards reduce operator’s real performance (efficiency level). 

When operators are not working on-standard jobs they are simply not producing any garments or any minutes. That is why to know operator’s actual performance on the on-standard jobs; operator’s efficiency is presented as on-standard efficiency. 

Formula for calculating on-standard is same but attended time. In case of overall efficiency calculation total produced minutes is divided by total attended minutes at work. But for the on-standard efficiency calculation total produced minutes is divided by total attended minutes at on-standard jobs. Refer to the following formula. 


On-standard Efficiency (%) = Total minutes produced / Total minutes attended for on-standard jobs*100

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How to calculate SAM for a garment?
Garment CM cost estimation using SAM or SMV
The Concept of Operator's Performance Rating
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Online Clothing Study: What is on-standard efficiency and overall efficiency?
What is on-standard efficiency and overall efficiency?
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