Mtm 1

MTM Is a procedure which analyses any human motion into basic motion required to perform it and assigns to each motion a predetermined time standard which is determined by the nature of motion and the conditions under which it is made

Steps involved in MTM 1.Reach

1.Turn

2.Grasp

2.Apply Pressure

3.Move

• APB

4.Position

• APA

5.Release

3.Disengage

1.REACH Is the basic hand motion employed when the predominant purpose is to move hand and finger to a destination

Reach is performed only by the finger and arm. Hand varying an object can still perform reach short reaches are performed only by moving finger, larger reaches by hand, forearm and upper arm

1.GRASP Is the basic finger and hand element employed to secure control of an object Hand and finger must obtain sufficient control of the object to be able to perform the next basic motion Object may be single object or group of stacked or piled object

1.MOVE Is the basic hand or finger motion employed when the predominant purpose is to transport an object to a destination Move by finger or hand Hand must exert control over the object during motion Object may be carried / pushed / slide Use of the hand as a tool is classified as

1.POSITION Is the basic finger or hand element employed to align, orient, engage one object with another to attain a specific relationship Alignment:

Make coincident intersection axis

Orientation: Engage:

geometrical match

insertion

Class of fit: Loose, close, tight Care of symmetry: S, SS, NS Ease of handle: P3SSD, P2SSE

E (ease), D (difficult), P2SE, P1NSD,

1.RELEASE Is the basic finger or hand motion employed to relinquish control of an object Release of performed only by the finger or hand Normal release (RL1) Contact release (RL2)

1.TURN Is the basic motion employed to rotate the hand about the long axis of the forearm The hand may be empty or holding an object Turn cannot be made while holding the wrist firm. Turn involves the two bones in the forearm and a pivoting motion at elbow

1.APPLY PRESSURE Apply pressure is an application of muscular force to overcome object resistance, accompanied by little or no motion Apply pressure is a hesitation or lack of motion The force is required for apply pressure is greater than that required for a normal more or turn against resistance Apply pressure pressure frequently indicated by a setting of the muscles

is

Apply pressure may be performed by any

Types of Apply Pressure APB: case exists when the body member acting requires initial orientation or adjustment to avoid loss of grip, injury or discomfort during force application on the object APA: case exists when the body member acting is already fully oriented or adjusted such that full force application to the object can be made immediately

1.DISENGAGE Is the basic hand or finger element employed to separate an object from another object where there is a sudden ending of resistance Friction or recoil must be present, merely lifting is not disengage Noticeable break of movement must be there