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MODAPTSModular Arrangement of Predetermined Time Standards
LEANSYSTEM.WORDPRESS.COM
LEARNING TOGETHER ABOUT INDUSTRIALENGINEERING, LEAN PRODUCTION SYSTEM, SIX
SIGMA, AND ERP SYSTEM
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MODAPTSModular Arrangement of Predetermined Time Standards
Predetermined time systems
Steps
How to be usedClasses of motions
Allowances
Exercises
(From: International MODAPTS Association, Inc. Kalamazoo, MI)
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Predetermined Time Systems
Techniques for studying work methods
Work is divided into micro elements that
are standard in any activity
These micro elements are represented
by symbols.
Note that in MTM system these symbols
are called therbligs.
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Steps
Determine all the symbols in a work
process
Assign standard time values to eachmicro movement
Total up the times to find total time/task
(Assuming additivity and independence)
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How to be used
Determine an efficient work method
Determine the time/unit for an efficient work method
MODAPTS uses modules (MOD) to express units ofhuman physical work (normal time- done by qualified,
thoroughly experienced employee) 1 MOD = .129 sec. 1 sec. = 7.75 MOD
1 MOD = .00215 min. 1 min. = 465 MOD
1 MOD = .000036 hr. 1 hr. = 27933 MOD
(Standard time with no allowances)
MODAPTS codes
Type of activity + Time to complete
M3P2,W5, etc.
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MODAPTS Classes of Motions
Movement
Done by the finger-hand-arm-shoulder trunk
system
Required to position a part of the arm to perform
the Terminal activities
Terminal Activities (GET and PUT)
Done at the end of a movement
In close proximity to the things being worked onAuxiliary Activities
Walking, bending, inspection, deciding, etc.
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Movement
Movements and terminal activities take place in pairs.Movement first then terminal activities Move to get, move to put
Examples: M3GO (move to touch)
Movement activities are classified by: Distance moved
Body part required to perform the move
Light/small objects vs. heavy/large objects Large objects : 16 x 16 x 16
Heavy objects : over 18 lbs.
Award the lowest category that is possible tosuccessfully complete the activity
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Movement (cont.)
Finger
1 MODHand
2 MODs
Forearm
3 MODs
Arm
4 MODsExtended Arm
5 MODs
1
2
6
12
18
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Moves with Small/Light Objects
Type Movement MODs DistancesFinger (M1) Knuckle 1 1
Hand (M2) Wrist 2 2
Forearm (M3) Elbow 3 6Whole Arm
(M4)
Shoulder directly
forward, perhaps body
assistance
4 12
Extended Arm(M5)
Shoulder fully left, right,or across the body 5 18
Trunk (M7) Shoulder involving thebody trunk
7 30
Note: Body assistance means to require the body to bend slightly (simultaneously with Move).It increases distances not time.
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Examples
M1 Movements Rub your thumb and index finger together
Depressing keys M1P0
Squeezing trigger M1P0
M2 Movements Following a body move: 5 x W5, M2G1 Positioning of a washer: M4G3 M2P5
M3 Movements Turning over the page
Draw a free hand line approximately 6 inches long How about half an inch long?
M4 Movements An imaginary 45 degree cone
Move forward 18 (inside the cone)
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Examples (cont.)
M5 Movements Outside imaginary 45 degree cone
Reaching up to an object from a high shelf
M5P2
Moving an object across the body M5P0
M7 Movements
Fully up, down, or across the body (hinged at the
waist) Picking up objects from the floorM7G1 M7P0
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Exercises
Hand moves are typically______inches
Whole arm move forward 15_______
Hand turns a nut down______
Reach to the floor while standing______
Using a pen or pencil perform the following and
provide the correct code:
Carry the object from I-10 to J-10_______
Turn your wrist to view the bottom of the object________
Carry the object to imaginary point H-20_______
Return the object to G-16_______
Carry the object to K-1_______
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Moves with Large/Heavy Objects
WeightLimit
Maximum Distance
For Large Object Only
2 6 12 18 24 35 39
ONE 0-2 lb M2 M3 M4 M5 M7 M7 M7
HAND 2-9 lb M3 M3 M4 M5 M7 M7 M7
9-18 lb M4 M4 M4 M5 M7 M7 M7
TWO 18-35 lb M4 M4 M4 M4 M4 M5 M7
HAND 35-136 lb M7 M7 M7 M7 M7 M7 M7
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Exercises
One hand Move a 14 lb. box 14 ________
Move a 18 lb. box 3 _________
Two hands Move a 100 lb. box 6 _________
Move a 40 lb. box 34 _________
Move a 30 lb. box 10 _________
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Terminal Activities
PUT and GET must be joined to a move
Influenced by:
Muscular control: precision Visual control: eye action
Mental control: mental decision
Low conscious control (G0, G1, P0)
Automatic response
Little muscular control, no visual or mental control
High conscious control (P2, P5, G3)
What is done at the end of move?
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Terminal Activities (cont.)
Type Conscious Control Description
High* Low
G0 X Touch only
G1 X Pick up easy objectP0 X No conscious
G3 X Pick up flat object,or objects in a bin, hard to
pick up object
P2 X Requires one feedback** (information)
P5 X Requires two feedbacks
*Employees are required to follow an activity through the end, using their eyes
**Provided by the employees eyes
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Terminal Activities (cont.)
For each activity below, is it high or low conscious?
Pick up a pencil from an uncluttered desk. ________
Pick up a straight pin from an uncluttered desk. ________
Pick up a match from a matchbox. _______ Put your pencil point exactly on the period at this sentence
end. _________
Put your pencil anywhere on this page. _________
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Simultaneous Activities
Always use an M2 to precede the second highconscious control activity
Left hand -----movement--High control activity at end
Right hand----simo-movement---wait----M2 moveHigh
control activity at endBoth lowconscious control: record the highest totalMOD
One low, one highconscious control: record on the
total high conscious control activity MOD valueBoth highconscious control: sum of MOD valuesfrom both hands
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Example
Left Hand Right Hand Total MODs
1 Independent
Simultaneous
M3P2
M3P2
M3P5
M2P5
13
122 Independent
Simultaneous
M4G3 M4P2
M4G3 M4P2
M4G3 M4P2
M2G3 M2P2
26
22
3 Independent
Simultaneous
M4G1 M4P2
M4G1 M4P2
M4G3 M4P5
M4G3 M2P5
27
25
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GET with Small/Light Objects
G0: Contact get (touching) Counting small change lying on the counter
Depress button- M4G0 M1P0
Push box M4G0 M4P0
G1: Simple grasp get (closing fingers aroundobjects) Pick up raised object M4G1
Grasp drawer handle
G3:Get with feedback (sensory or visualfeedback involved) Pick up small or flat or jumbled object M4G3
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GET with Large/Heavy Objects
G2: One hand engagement Picking up a suitcase
G4: Two hand engagements Unobstructed object, free standing, unimpeded by
others Bend over, grasps an object with two hands and
returns to a standing position- M7G4 M7P0
G8: Three hand engagements Slightly impeded by others One hand- pull the box away, two handspick it
up
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PUT with Small/Light Objects
P0: Simple put (general or indefinite location) Sliding an object against a stop
Picking up a small object and placing it in the other handM4G3 M4P0
Tossing object into boxM3P0
P2: Put with feedback (definite location) Requiring only one feedback form one or more of senses
(usually eyes)
Locate Phillips screwdriver in slotM3P2
P5: Put with feedbacks (exact location) More than one correcting motion, and more than one change
in direction
Putting a screwdriver blade into a slotted screw head- M4P5
Placing nut on bolt- M4P5
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PUT with Large/Heavy Objects
P0: General location (no orderliness) Hand does not touch object again
Place 40 lb. box on table ______
P2: With orderliness Hand do not touch object again
Place 40 lb. box to table edge _____
P5: One new contact (exact location) Using one additional hand engagement once the
object is placed down
Moderately heavy box placed exactly in line withothers
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ExercisesLean over, pick up a carton, and return to a standing positionbefore walking _______
Place a pencil point where two lines cross ______
Begin with hands in the printed area
Pick up a pencil at C-14, put point on F-9 _______
Pick up a pin at C-14, put point on E-10 _______
Pick up a washer at I-9, put in other hand _______
Slide a washer from H-9 off the table into the lap _______
With both hands, slide the ruler up to line F _______
Pick up the pencil near the sharp end with the left hand, from B-4.Pick up the washer with the right hand from B-13. While carrying
these to the print area, put the washer on the pencil. Slide thewasher along to the end of the pencil. ___________
Pick up a washer from B-14 and then one from B-9 with the righthand. Return to rest in the approximate starting position.___________
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Auxiliary Activities
J2: Juggle
Two criteria
The object is already in the control of the operator and better
control is required
All other activity must stop
Place a nut on a screw while there are several nuts in the
palm rolling the nut out from the palm_______
X4:Apply extra force All other motion stops, and then the body braces itself
B17: Bend and arise (if hand goes below the knee)
S30: Sit and stand (up and down movement)
W5: Walk