2/2/23, 11:34 AM An introduction to GSD – General Sewing Data | TEXTILE LIBRARY

TEXTILE LIBRARY

An introduction to GSD – General Sewing Data

August 1, 2018 — textilelibrary

Definition:

GSD is a technique for methods analysis and the setting of time standards for the sewn products
industries.
GSD was developed using MTM core data, to provide a consistent, accurate and easy to understand,
easy to communicate, methods analysis and time standards determination technique. It was designed
specifically for the sewn products industries, and was researched and developed within these
industries.

The final system consists of 36 items of data in 7 categories with simple retrieval codes for ease of
application and understanding. Each data has a constant TMU value. There is also a system of sewing
code derivation within the system and sewing formulae to facilitate the calculation of machine time

Uses of PMTS

1. It is used to find out the required time to perform different jobs.

2. It can also be used to modify and improved the methods.
3. It can also be used to modify and improve the methods before the work starts.
4. To estimate labor costs.
5. It can be used to find the times for short motions, which cannot be measured by stopwatches.
6. It can also be used for repetitive work.

Advantages of PMTS

The PMTS have flowing advantages.

1. It eliminates inaccuracies with stopwatch time study method.

2. This method is the most suitable method for short cycle and highly repetitive operations.
3. Without going to the work place, the required timing can be calculated.
4. The rating can be eliminated.
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5. It produces consistent measurements as compared to the stop watch time study data.
6. Less costly when compared to the time study method.
7. By using this method other methods can be compared.

Disadvantages of PMTS

1. Only manual operations can be tacked

2. To measure time in some operation we have to gives the stopwatch.

Different forms of PMTS

Method-Time-Measurement (M-T-M) and the work Factory systems are the two main forms of PMTS.
Let us first consider the M-T-M system.

M-T-M system

Method-Time-Measurement Association developed this system. That is why it is called M-T-M system. It
got the recognition in 1948. M-T-M system analyses an industrial job basic movements. From the tables
of these basic motions, depending on the kind of motion, and conditions under which the motion is
made predetermined time values are allocated to each motion. By adding the allocated time, normal
time required for completing a job/operation can be found out. Finally the standard time can be obtained
by adding suitable allowances. M-T-M measures time in terms of TMUS (Time measurement units) and
1 TMU = .0006 minutes.

The Basic Motions of MTM-1

PRINCIPAL MOTIONS CODE

REACH R
GRASP G
RELEASE RL
MOVE M
POSITION P
DISENGAGE D
TURN T
APPLY PRESSSURE AP
CRANK C
EYE ACTION OR EYE FOCUS TIME ET & EF
BODY MOTIONS CODE
FOOT MOTION FM
LEG MOTION LM
SIDE STEP SS

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BEND, STOOP OR KNEEL ON ONE

B S MEK
KNEE
AB, AS
ARISE FROM ONE KNEE
AMEK
KNEEL ON FLOOR BOTH KNEES KBH
ARISE FROM FLOOR ON BOTH KNEES AKBK
SIT SIT
STAND STD
TURN BODY TB
GSD Categories

GSD provides categories for both handling & machining. The handling can be classified either as First
Level categories or Second Level categories.

FIRST LEVEL CATEGORIES

Obtaining & Matching Parts M

Aligning & Adjusting Parts A
Forming Shapes F
Trimming & Tool Use T
Asiding Parts                         A
Handling Machines M

SECOND LEVEL CATEGORIES

Get & Put            G or P

SEWING

Sewing S

GSD DATA CARD

TMU

MG2T G,G,P,G,G 76
MG2S G,P,G,P,G,G 107
OBTAINING FOOT P,F 38
AND MATCH
PART MAPE G,P,G 50
MAP1 G,P,G 56
MAP2 G,P,G,P,G 69

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AM2P G,G,P,G 61
ALIGNING AJPT G,P,G 43
AND
ADJUSTING ARPN G,P,G,P,F 75
APSH G,P 24
FFLD G,P,G 43
FORMING
FCRS G,GW,P,PW 28
SHAPES
FUNF G,P 23
TCUT G,P,P,P 50
TRIMMING TCAT P,P 25
AND TOOL
USE TBLD G,P 33
TDCH G,P,P,P 49
APSH G,P 24
ASIDING AS1H G,P 23
AS2H G,G,P 42
MS1A F,F 17
MS1B F,PB,F 26

HANDLING MS1C F,PC,F 37

MACHINE MHDW G,P,G,P,G 46
MBTB G,P,P,P,G 34
MBTE G,P,PT,P,P,G 37
GP1E G 14
GP1H G 20
GP2H G,G 33
GPCO G 9
GPOH G 6
GET AND
GPAG G 10
PUT
PPAL P 10
PPOH P 6
PPST P 14
PPL1 P 27
PPL2 P,P 47

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F Foot or short leg motion  

P Pace or step to move body  
B Bend and arise  
BD Bend Down  
AB Arise From Bend  
ADDITIONAL
MTM SIT SIT down in chair  
ELEMENTS
STD Stand from chair  
E Eye action  
C Crank  
R Regrasp  
AB Apply pressure  
WW Write a Word  
WL Write a Letter  
CLERICAL
WD Write a Digit or number  
DATA
WP Write a Punctuation mark  
RW Read a Word  
 

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