How to Calculate Performance Rating?

Question: How to calculate performance rating? Actually, I'm not clear about this. Please tell me in detail.
Performance rating

How to Calculate Performance Rating?

The performance rating is not calculated by any means. 
Instead, through observation of an operator's working speed and body movement, the time study practitioner rate an operator. And the rating is done against normal working speed. Each observer has a conception of the normal speed (100% rating) of doing a job. Comparing to that he/she needs to rate the operator. 

Rating an operator is subjective. If three engineers do rating one operator at the same time for performing the same operation, the rating given to the operator may very. Engineers need to practice a lot on rating and understanding the 100% rated operator. 

I am not sure what kind of questions you have in your mind. But by reading these 3 articles on performance rating, you will get some better ideas on performance rating. Then watch the following video in which the rating of a different activity is shown.

#1. The Concept of Operator's Performance Rating
#2. An Interesting Question on Garment SAM Calculation and Use of Rating Factor
#3. How to Use Performance Rating Calculating BasicTime?

Watch this YouTube video to understand the rating (Webinar recording)




Conclusion:

Though I said that rating is not calculated if you want to verify whether your rating is accurate or not and if you want to verify how far your rating percentage compared to the standard rating, you can take reference of PMTS based operation SAM. From the established SAM and observed cycle time, you can derive an accurate rating percentage through the reverse calculation.  From the above video, you can get the idea of reverse calculation for knowing operator performance rating. 

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