Read more: What is Cycle Time, Basic Time & SMV?

Definition of Rating:

In a production floor, different types of style are running. Almost 90% operation are matching/similar in every new style of sweater products & about 80% similar at knit/woven product. So a number of operator are doing similar process in different lines & several styles as well.

Is every operator of same operation doing same production?

If same style running in several lines then also doing same or not?

For the maximum operator, answer will be no. Only few operator will do as per standard rate & very few operator may do more than the standard.

What is the reason behind this? How do you classified them?

For example, one operator achieve 100% & another operator achieve 75% in the same process. That means 2^nd operator is working actually at a slower pace compared to a 100% standard operator.

•         Machine same
•         Method same
•         Machine speed same
•         Workstation organize also same

But if an operator use less machine speed, excess motion than the standard then definitely he/she will achieve less & that is called Rating.

Simply we can express:

How efficiently he/she complete the task based on standard is called rating.

To measure the pace of work & determine standard time for the slower operator should perform is the main objective.

For example: Operation target is 120 pcs. Operator A is using 0.5 Min & Operator B is using 0.59 Min to complete their task means B is performing at 85 % rating. So if we give rating to the operator B then the calculation is-

0.59*85%

=0.5 Min (Equal to standard time).

So, Equation of Performance Rating 

 

 

For example, using of above data,

=85%

Working Attentively.

Operator working rating scale are shown in the below table.

Rating Scale	Present Status	Remarks
0	No Activity / No work	Can’t do anything/ New, Need training
1-50	Very Slow	Very week, No interest to the job, Aimless,  Love to pass idle time.
51-75	Just below standard	Have scope to improve by train & motivation
76-100	Good in their job	Faster than others, Satisfactory level of quality & quantity
100-Above	Over Achiever	High performer. Use 100% time of their working period. Love to work.

Performance Rating:

Operation Name	Operator Name	Observed Time	Rating	Basic Time
Close Side Seam	A	0.69	72%	0.50
Close Side Seam	B	0.50	100%	0.50
Close Side Seam	C	0.4	125%	0.50

From the above table, operator B is standard, Operator A is comparatively slow than B & Operator C is high achiever than the all.

Note: 

To calculate performance rating, experience is very important because it is a subject to compare with the standard performance. First have to know standard time of that process to compare with observe time to get rating of his/her. If 3 work-study officer give rating on Operator A, it may vary with each other. The more you study, the more your rating will perfect.  So without proper experience reading of rating will not Accurate. Rating is a tool that is used to assess the speed and effectiveness of a worker or employee performing a specific task.

To know the use of rating to get basic time then

Read more: What is Cycle Time, Basic Time & SMV?