IESD-Sewing data analysis: MTM-2 codes & Application
Sharmin Akther Diba
Industrial & Production Engineer
Rajshahi University of Engineering & Technology (RUET)
Email: dibasrmn@gmail.com
LinkedIn: Sharmin Akther Diba
IESD stand for Industrial Engineering sewing data, based on MTM 2. The difference between GSD and IESD is GSD follow MTM-3 , IESD follow MTM- 2
Predetermined Time: collection of valid standard times assigned to fundamental motions/group of motions that cannot be precisely evaluated with ordinary stopwatch time study. It is the result of studying a large sample of diversified operations with a time device such as motion-picture camera capable of measuring very short motion elements.
Time Standard: Time required by an average skilled operator, working at a normal pace, to perform a specified task using a prescribed method, allowing time for personal needs, fatigue and delay.
1. Why Is it Important?
2. Data for scheduling
3. Data for staffing
4. Data for line balancing
5. Data for materials requirement planning
6. Data for system simulation
7. Data for wage payment
9. Data for employee evaluation
MTM: Developed at Methods Engineering Council, USA in 1940 byDr. Harold Maynard, Mr. Gustave Stegemerten, Mr. John Schwab. The only PMTS which entire data and research made completely & readily available to the general public. It was the best methods analysis system in existence.
Revolution of MTM:
Condition:
• Operation cycles under 0.6 minutes
• Highly repetitive work
• Where detailed methods description is required
• Work with a high level of simultaneous motions
• Where there is doubt in the analyst’s mind
With these conditions, use MTM-1 instead.
Examples of MTM-2:
Get - pen from desk
Put - to the other hand
Get - the cap of the pen
Put - the cap aside
Get - worksheet from the desk
Put - worksheet to front
Put - position to commence writing
Get – G: Get is an action with the predominant purpose of reaching with the hand or fingers to an object, grasping the object and subsequently releasing it.
Starts
|
With
reaching to the object
|
Includes
|
Reaching
to, gaining control and subsequently releasing control of the object
|
Ends
|
When
the object is released
|
· Case of GetVariables of Get:
· Distance Reached
· Weight or Resistance of Motion
Cases of Get:
GA – No Grasping motion
simple contact grasp (place hand on object)
GB – One Grasping motion
Simple closing of the fingers on small, medium or large object with one grasping
GC – More than one grasping motions
Complex grasping actions with precise and careful fingers movement
GET Distance:
Centimeters
|
Codes
|
|
Over
|
Not Over
|
|
0
5
15
30
45
|
5
15
30
45
Upwards
|
5
15
30
45
80
|
Get Weight: Get Weight is the action required for the muscles of the hand and arm to take up the weight of the object or its resistance to motion. 1 TMU/kg
Starts
|
With
the grasp on the object completed
|
Includes
|
Muscular
forces necessary to gain full control of the weight of the object
|
When
the object is sufficiently under control to permit movement of the object
|
Starts
|
With
an object grasped and under control at the initial place
|
All
transporting and correcting motions necessary to place an object
|
|
Ends
|
With
the object still under control at the intended place
|
· Case of Put
· Distance Reached
· Weight or Resistance of Motion
Cases of Put:
PA – No Correction
Placing an object to an approximate location
PB – One Correction
Some non-obvious corrections
PC – More than one correction
Corrections are obvious
Difficult to handle
Put Distance:
Centimeters
|
Codes
|
|
Over
|
Not Over
|
|
0
5
15
30
45
|
5
15
30
45
Upwards
|
5
15
30
45
80
|
MTM-2 Motion Code:
PB30: Put, One Correction, From 15 to 30 cm away
Put Weight: Put Weight is an additional Put motion to take account of the slowing down due to weight or resistance. 1 TMU/kg
Starts
|
When the move begins
|
Includes
|
The additional time, over and above the time in Put, to compensate
for the differences in time required in moving heavy and light object over
the same distance
|
Ends
|
When the Put ends
|
MTM-2 Data Card:
Code
|
GA
|
GB
|
GC
|
PA
|
PB
|
PC
|
5
15
30
45
80
|
3
6
9
13
17
|
7
10
14
18
23
|
14
19
23
27
32
|
3
6
11
15
20
|
10
15
19
24
30
|
21
26
30
36
41
|
Meaningful Symbols:
# Two hands Simultaneous
*Indicating a moving action
( ) Simultaneous action, get higher TMU
Combined Actions:
ABCD Align part using 1 hand
|
|||||
Left Hand Description
|
TMU
|
Left
|
Right
|
TMU
|
Right Hand Description
|
Reach to get 1 part
Move part to new location
|
9
11
|
GA30
PA30
|
|||
TMU
20
|
|||||
EFGH Align part using 1 hand
|
|||||
Left Hand Description
|
TMU
|
Left
|
Right
|
TMU
|
Right Hand Description
|
Move to position part
|
11
9
|
* PA30
* GA30
|
PA30
GA30
|
11
9
|
Move to position part
Hand return to original position
|
TMU
20
|
|||||
Exercise:
1. Standard motion sequence of answering a mobile phone
2. Standard motion sequence of using a scissors to cut an object
Code
|
GA
|
GB
|
GC
|
PA
|
PB
|
PC
|
5
15
30
45
80
|
3
6
9
13
17
|
7
10
14
18
23
|
14
19
23
27
32
|
3
6
11
15
20
|
10
15
19
24
30
|
21
26
30
36
41
|
Foot – F: Foot motion is a short leg or foot motion when the purpose is not to move the body.
Starts
|
With the foot or leg at rest
|
Includes
|
A motion not exceeding 30cm (12”) that is pivoted (bent) at the hip,
knee or instep
|
Ends
|
With the foot in a new location
|
Step – S: Step is a leg motion with the purpose of moving the body or leg motion longer than 30cm.A single Foot motion allows for movement in one direction only. When a Foot motion occurs with force being applied, an Apply Pressure (A) should be allowed to compensate for the force.
Starts
|
With the leg at rest
|
Includes
|
Either: A motion of the leg when the purpose is to achieve
displacement of the trunk
|
Ends
|
With the foot in a new location
|
Eye Action – E: Eye action (7 TMU) is an action with the purpose of:Steps may be in any direction, forward, backward or to the side such as walking.
1. Recognizing a readily distinguishable characteristic of an object (a simple yes/no decision)
2. Shifting the aim of the axis of vision to a new viewing area
Starts
|
When other actions must cease because a characteristic of an object
must be recognized
|
Includes
|
Either: Muscular readjustment of the lens of the eyes to recognize a
distinguishable characteristic of an object
Or: The eye motion performed to shift the aim of the axis of vision
to a new viewing area
|
Ends
|
When other actions can start again
|
Crank – C: Crank is a motion with the purpose of moving an object in a circular path of more than half a revolution with the hand or fingers.
Starts
|
With the hand on the object
|
Includes
|
All transporting motions necessary to move an object in a circular
path
|
Ends
|
With the hand on the object when one revolution is completed
|
Bend & Arise – B: Bend & Arise are the actions used when the body changes its vertical position. Typical movements characteristic including sitting down, kneeling and standing up. Kneels on both knees should be 2 B.
Starts
|
With the motion of the trunk forward from an upright posture
|
Includes
|
Movement of the turn and other body members to achieve a vertical
change of body position to permit the hands to reach down to or below the
knees and subsequent arise from this position
|
Ends
|
With the foot in a new location
|
Average Daily Performance:
Low Task: The performance of the working pace sustained throughout the day under daywork payment conditions.
High Task: The performance of the working pace sustained throughout the day under incentive payment conditions.
Low Task – MTM 100:
Production standards based on daywork level
1 Second = 27.8 TMU
1 Minute = 1667 TMU
1 Hour = 100,000 TMU
High Task – MTM 120:
Performance of an average experienced operator working at an efficient pace, over an eight-hour day under incentive conditions, without undue or cumulative fatigue. Often stated as the incentive pace.
1 Second = 33.33 TMU
1 Minute = 2000 TMU
1 Hour = 120,000 TMU
Low/High Task:
MTM 100
|
MTM 120
|
Daywork Payment Conditions
|
Incentive Payment Conditions
|
Task A = 800 TMU
SAM = 800/1667
= 0.48 min/pc
Output = 1000 pcs
Cost = $ 0.10 × 0.48 × 1000
= $ 48
|
Task A = 800 TMU
SAM = 800/2000
= 0.40 min/pc
Output = 1200 pcs
Cost = $ 0.10 × 0.40 × 1200
= $ 48 + Incentive
|
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