APRC的MTM资料1

PROCEDURE:CONTENT AND USE FOR THE MTM TABLE.

MTM, REV: A1, 03/07/2006

OBJECTIVE

Define method for the use of the Micro-Movements analysis.

SCOPE

This procedure applies to IE Department.

RESPONSIBILITIES

IE department is responsible to do the Micro-Movements analysis to those operations than require it.

DEFINITION

MTM: (Methods Time Measurement) The table that content every operation or hand method, split by the basic movements required to perform it; assigning to each movement a pre-established standard time, which is given according to the movement nature and the conditions under which it is performed.

RELATED DOCUMENTS

MTM              TABLE: MTM TABLE

                                    

FUNCTION

As base to develop good methods:

Develop of good methods before start production.

Improve the actual methods.

Guide for products design.

To selection of efficient equipment.

Guide for the jigs and fixture design.

As base for establish production norms:

Establishing individual works time norms.

Develop of standard data.

Cost estimation.

Others:

Training to employees for the understanding of methods.

Adjust difference in relation with the production norms.

Brings a bigger base to the analysis and movements study

Help the operator to improve abilities.

Help in the study of layout.

CONTENTS OF THE MTM TABLE

TALBE 1: REACH ( R )

It is basic manual movement made with prevail end to transport the hand or fingers to a destination.

It is necessary try directly on three variables upon analyzing reach movement.

These are:

Reached distance: Distance is determined by measuring the traveled distance of the hand upon carrying out a reach.

Control level is split by cases:

A) Reach an object in a fixed place or remained on the other hand.

B) Reach an object in a place that could vary lightly from one cycle to another.

C) Reach an object amassed with another.

D) Reach a very small object or when precision is required to catch.

E) Reach from an indefinite location in order to put the hand in position for the body balance.

Movement type (A or B):

The hand in rest at the beginning like at the end of the movement (the first four of the table).

Hand in movement (MM) either at the beginning or at the end of the movement.

TABLE 2: MOVE ( M )

The basic manual movement made with the predominant end to transport an object to a destination by the fingers or hand.

Upon reaching the movements, it should be directly try with the following points:

Distance: To travel in cm.

Time in TMU

A) Move an object to another hand or against a collide (despising the object weight).

B) Move the object toward an approximate or defined place (despising the object weight).

C) Move an object to a destination or exact point (despising the object weight).

MMB) Move an object but in the hand has movement either at the beginning or at the end of the movement (despising the object weight).

Allowed weight:

Kg Max.: Maximum weight to be moved in kilograms.

STA TMU: Static movement.

MOT FAC: Dynamic movement.

Total time for move={ Time (TMU)+[ STA TMU (weight)]+[ MOT FAC (weight)]}

TALBE 3: TURN ( T )

It is the basic manual movement made upon making to rotate the empty or full hand through the longitudinal axis of the forearm.

The variables are the following:

Measured distance in degrees.

Resistance

Without resistance or empty hand

Small: up to 1kg.

Medium: from 1.1 to 5kg.

Big: from 5.1 to 16kg.

TABLE 4: GRASP ( G )

It is the basic manual movement of the fingers of the hand, used  in order to assure the control of an object.

When reach control by mechanical means or for any another member of the body, the movement or movements are not classified as GRASP. For example, to get  control of an object by tweezers.

TALBE 5: PLACE ( P )

It is the basic manual movement made in order to take an object to an exact relationship (align, guide, or insert), predetermined with another object.

Being the related variables:

The adjustment sort: Precision level of required.

The symmetry:

S) Symmetrical: It is the one which do not require orientation during the movement of placing.

SS) Semi-symmetrical: All symmetry less the symmetrical or not symmetrical.

NS) Not symmetrical: The object could insert in only in one way, on the axis orientation.