topic 4 stopwatch time study

7/29/2019 Topic 4 Stopwatch Time Study

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T PI 4

STOPWATCH TIME STUDY


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4.1 Equipment and forms

4.2 Time study procedure

OutlineOutlineTOPIC 4 : STOPWATCH TIME STUDY

4.2.1 Preparation4.2.2 Data collection4.2.3 Calculations


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LearningLearning OutcomeOutcomeUpon successful completion of this topic,

the student will be able to:Perform:

Time study using stopwatchTime study using stopwatch

Calculate cycle timeCalculate cycle time

AnalyseAnalyse the time studythe time study


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TOPIC 4.1 : E ui ment and Forms


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Time Study EquipmentsTime Study EquipmentsThe following equipment is needed for time

study:

Timing device

Time study observation board

Other equipments (pencil, eraser, devicelike tachometer etc.)


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Time Study EquipmentsTime Study Equipments


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The stop watch is the most widely usedtiming device used for time study

Although electronic timer is alsosometimes used

Timing DevicesTiming Devices

Electronic timer can measure timeaccurately to the third decimal of a secondand can keep a large volume of time datain memory


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Cumulative Timing

In this method stop watch runscontinuously through out the study.

Watch is started at first elements of workc cle to be timed and not sto ed until

Timing elementTiming element

whole study is completed At the end each element watch reading is

recorded.

Time for each individual element iscalculated later by successive subtractions.

This procedure gives the total time duringwhich job done is recorded in the study


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Fly back timing

In this method hands of the watch arereturn to zero at the end of each elementand are allowed to start immediately fornext elements.

Timing elementTiming element

Time of each element is obtained directly. Time on and time off (study stated/ ended)

are also mentioned.

These are called check times anddifference elapsed time

Sum of all elemental times, ineffective timeand check time is called recorded time.


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It is printed form with spaces providedfor noting down the necessaryinformation about the operation beingstudied:

Time StudyTime StudyObservation SheetObservation Sheet

o Name of operationo Drawing number

o Name of the worker

o Name of time study person

o Date and place of study


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Spaces are also provided in the form forwriting detailed description of theprocess (element wise):

Time StudyTime StudyObservation SheetObservation Sheet

- Recorded time or stopwatch reading sfor each element of the process

- Performance rating (s) of operator

- Computation


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It is a light weight board used for holding

the observation sheet and stopwatch inposition

It is of size slightly larger than that of

Time Study BoardTime Study Board

Generally, the watch is mounted nearthe upper right-hand corner of the board

The board has a clamp to hold theobservation sheet


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Time Study BoardTime Study Board


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TOPIC 4.2 : Time Stud Procedure


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Time Study ProcedureTime Study ProcedureStep 1 : Define objective of the study.This

involves statement of the use of

the result, the precision desired,and the required level ofconfidence in the estimated time

s an ar sStep 2 : Verify that the standard methodand conditions exist for theoperation and the operation isproperly trained.

If need is felt for method study or furthertraining of operator, the same may be

completed before starting the time study


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Time Study ProcedureTime Study ProcedureStep 3 : Select operator to be studied if

there are more than one operator

doing the same taskStep 4 : Record information about the

standard method, o eration,

operator, product, equipment,and conditions on the Time Studyobservation sheet

Step 5 : Divide the operation intoreasonably small elements, andrecord them on the Time Studyobservation sheet


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Time Study ProcedureTime Study ProcedureStep 6 : Time the operator for each of the

elements. Record the data for a

few number of cycles on theTime Study observation sheet.

To estimate the total number of

observations to be taken

Step 7 : Collect and record the data for

required number of cycles bytiming and rating the operator


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Time Study ProcedureTime Study ProcedureStep 8 : Calculated the representative

watch time for each element of

operation. Multiply it by ratingfactor to get normal time

=

Calculate the normal time for the wholeoperation by adding the normal time of itsvarious elements.


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Time Study ProcedureTime Study ProcedureStep 9 : Determine allowances for fatigue

and various allowances.

Step 10: Determine standard time ofoperation.

Standard time = Normal time X (1+ allowances%)

topic 4 stopwatch time study

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