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PREDETERMINED TIME SYSTEMS:METHODS-TIME MEASUREMENTIENG 301FUNDAMENTALS OFWORK STUDY ANDERGONOMICS1
METHODS TIME MEASUREMENT (MTM) This system is defined as a procedurewhich analyzes any manual operationor method into basic motions require toperform it, and assigns to each motiona predetermined time standard whichis determined by the nature of themotion and the conditions under whichit is made.2
MTM-1 The unit of time used is one hundredthousandth of an hour (0.00001 hour),and is referred to as one timemeasurement unit (TMU). Thus, oneTMU equals 0.0006 minute.3
Reach Reach is the basic element used whenthe predominant purpose is to movehand or finger to a destination. Thetime for making a reach varies with thefollowing factors: Condition (nature of destination)Length of the motionType of reach4
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Reach There are three types of reach andmove1.2.3.Hand is not moving at the beginning andat the end of reach/moveHand is moving at either beginning orend of reach/moveHand is in motion at both beginning andend of reach/move6
Move Move is the basic element used when thepredominant purpose is to transport anobject to a destination.The time for move is affected by thefollowing variables: Condition (nature of destination)Length of motionType of moveWeight factor (static and dynamic)7
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Turn Turn is the motion employed to turnhand, either empty or loaded, by amovement that rotates the hand, wristand forearm about the long axis of theforearmThe time depends on two variables; Degrees turnedWeight factor9
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Apply Pressure It provides full cycle time ordevelopments by the components asrelated to other motions11
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Grasp Grasp is the basic element employedwhen the predominant purpose is tosecure sufficient control of one or moreobjects with the fingers or hand topermit the performance of the nextrequired basic element.13
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Position Position is the basic element employed toalign, orient and engage one object withanother object, where the motions used areso minor that they do not justifyclassification as other basic elements.The time for position is affected by; Class of fitSymmetryEase of handing15
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Release Release is the basic element torelinguish control of an object by thefingers or hand.Two classifications; Normal release, simple opening of fingersContact release, release bgins and iscompleted at the instant the followingreach begins17
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Eye Times In most work, time for moving and focusingthe eye is not a limiting factor andconsequently does not affect the time for theoperation. When the eyes do direct thehands or body movements, however, eyetimes must be considered. There are twotypes of eye time; Eye focusEye travel time19
Eye Times Eye focus time is the time required to focusthe eyes on an object and look at it longenough to determine certain readilydistinguishable characteristics within thearea which may be seen without shifting theeyes.Eye travel time is affected by the distancebetween points from and to which the eyetravels, and the perpendiculat distance fromthe eye to the line of travel20
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2. METHODS TIME MEASUREMENT (MTM) This system is defined as a procedure which analyzes any manual operation or method into basic motions require to perform it, and assigns to each motion a predetermined time standard which is determined by the nature of the motion and the conditions under which it is made. 3. MTM-1.
