8/6/2019 Work Study- Rating

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RATING

5th step assessing the effective speed of working of

the operative relative to the observers concept of therate corresponding to standard rating

A qualified worker is one who has acquired the skill,knowledge and other attributes to carry out the workin hand to satisfactory standards of quantity, qualityand safety.

The experienced worker:

1. Achieves smooth and consistent movements;

2. Acquires rhythm;

3. Responds more rapidly to signals;

4. Anticipates difficulties and is more ready toovercome them;

5. Carries out the task without giving theappearance of conscious attention, and istherefore more relaxed.

The average qualified worker

Normal distribution

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8/6/2019 Work Study- Rating

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Time standards need to be achievable by the majorityof the workers.

Also a workers rate of work tends to vary from day-to-day.

Need a mechanism to cater for this!

Rating is the assessment of the worker's rate of

working relative to the observer's concept of the ratecorresponding to standard pace

If the standard pace is maintained and the appropriaterelaxation is taken, a worker will achieve standardperformance over the working day or shift.

Standard performance is the rate of output whichqualified workers will naturally achieve without over-exertion as an average over the working day or shift,provided that they know and adhere to the specifiedmethod and provided that they are motivated to applythemselves to their work

This performance is denoted as 100 on the standardrating and performance scales

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The rate of working most generally accepted in theUnited Kingdom and the United States ascorresponding to the standard rating is equivalent to

the speed of motion of the limbs of a man of averagephysique walking without a load in a straight line onlevel ground at a speed of 4 miles an hour (6.4kilometres per hour). This is a brisk, business-like rateof walking, which a man of the right physique and wellaccustomed to walking might be expected tomaintain, provided that he took appropriate restpauses every so often.

Dealing a pack of 52 playing cards in 0.375 minutes.

How do you learn to rate work?

Through practice

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Factors affecting the rate of working

Variations in actual times for a particular element may

be due to factors outside or within the control of theworkmen. Those outside this control may be:

Variations in the quality or other characteristics ofthe material used, although they may be within theprescribed tolerance limits;

Changes in the operating efficiency of tools op

equipment within their useful life; Minor and unavoidable changes in methods or

conditions of operation;

Variations in the mental attention necessary forthe performance of certain of the elements;

Changes in climatic and other surroundingconditions such as light, temperature, etc.

These can generally be accounted for by taking asufficient number of studies to ensure that arepresentative sample of times is obtained.

Factors within the operative's control may be:

Acceptable variations in the quality of the product;

Variations due to the individual's ability;

Variations due to the attitude of mind, especiallythe attitude to the organization for which he or sheworks.

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Certain heavy tasks are performed at their optimumpace.

Be wary of workers that fumble or hesitate a lot. Thisis usually an indication that the operator needs furthertraining.

Be aware that well trained operators motions mightlook slow compared to inexperienced operators, butthis is because they are using the most efficient wayof doing the work.

The study person should be careful not to rate toohighly when:

The worker is worried or looks hurried

The worker is obviously being over-careful

The job looks difficult to the study person

The study person is working very fast

Conversely there is a danger of rating too low when:

The worker makes the job look easy

The worker is using smooth, rhythmic movements

The worker does not pause to think

The worker is performing heavy manual work

The study person is tired

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