My Class

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IE 419 Work Design Productivity and
Safety Dr. Andris Freivalds Class 15
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IE 419 Work Design Productivity and
Safety Dr. Andris Freivalds Class 15
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Basics of Basic MOST

• Only three activity sequences
• General Move
• Movement of object freely through space
• ½ of all work sequences
• Controlled Move
• Movement of object attached to another or in
  contact with a surface
• ? of all work sequences
• Tool/Equipment Use
• 1/6 of all work sequences

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General Move - Basics

• Has 4 subactivities
• A Action distance (horizontal)
• B Body motion (vertical)
• G Gain control (i.e. GET cases A, B, C)
• P Placement (i.e. PUT cases A, B, C)
• Grouped into 3 phases
• Get reach and gain control of object
• Put move object to new location
• Return distance walked back to workstation, not
  for hands

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General Move
A Action distance B Body motion G Gain
control P Placement

• Obtain Index Values based on characteristics
• Sum Index Values, multiply by 10 ? TMUs

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Controlled Move Typical Steps

• Reach some distance with hands for object,
  perhaps with body motion or steps
• Gain manual control of object
• Move object over a controlled path, perhaps with
  body motion or steps
• Allow time for control (a process) to occur
• Align object at end of process time
• Return to workplace (if needed)

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Controlled Move - Basics

• Has 3 new subactivities
• M Move controlled (path is controlled)
• X Process Time (controlled by mechanical
  devices, not manual actions)
• I Alignment (conclusion of process to achieve
  alignment of objects)
• Grouped into 3 phases
• Get and 3) Return as before
• Move over controlled path or actuate device

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Controlled Move
A Action distance B Body motion G Gain
control M Move controlled X Process Time I
Alignment
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MOST - Controlled Move
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Ex 2 - Controlled Move
Engage a feed lever on a milling machine.
A1 Reach to lever (within reach) B0 No body
motion G1 Gain control of lever M1 Move lever
(lt 12 in.) to engage X10 Process time of 3.5
sec I0 No alignment A0 No return
?IV 11110 13, 13x10 130 TMUs
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Controlled Move - Parameter IndexingMove
Controlled (M)

• M6 two stages gt 24 in
• or with 1-2 steps
• M10 3-4 stages
• or 3-4 steps
• M16 6-9 steps
• Extended values

• M1 one stage 12 in
• or press button/switch/knob
• M3 one stage gt 12 in
• or push/pull with resistance
• or seat/unseat
• or high control
• two stages 24 in

Note Applies to feet also, Ex. Push pedal gt 12
in ? M3
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Move Controlled - Crank

• Crank
• move fingers, wrist, forearm
• in circular path
• more than ½ revolution
• lt ½ rev ? push/pull/pivot
• M3 1 rev
• M6 2-3 rev
• M10 4-6 rev
• M16 7-11 rev

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Controlled Move Process Time
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Controlled Move Alignment

• Line up to a point(s)
• Single eye focus
• I1 to one point in single correcting action
• I3 to two 4 in apart
• I6 to two gt 4 in apart
• I16 with precision

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Controlled Move Alignment
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Ex 3 - Controlled Move

• A press operator moves a 4x8 ft. sheet of thin
  gauge steel a distance of 14 inches. The sheet is
  aligned to two stops on opposite ends of the
  sheet (not necessary to reposition hands during
  alignment). The operator takes one step back to
  gain control of the sheet.

?IV 3336 15, 15x10 150 TMUs
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MOST - Controlled Move
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Ex 4 - Controlled Move

• A material handler takes hold of a heavy carton
  with both hands and pushes it 18 in. across
  conveyor rollers.

?IV 133 7, 7x10 70 TMUs
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Ex 5 - Controlled Move

• Using a foot pedal to activate the sewing
  machine, an operator sews a stitch requiring 3.5
  sec process time.

?IV 11110 13, 13x10 130 TMUs
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Tool/Equipment Use Typical Steps

• Get tool
• Reach some distance with hands for tool, perhaps
  with body motion or steps
• Gain manual control of tool
• Put tool in place
• Move tool to where it will be used, perhaps with
  body motion or steps
• Place tool in position for use
• Use tool apply tool action
• Put tool aside, perhaps for later reuse
• Return to workplace (if needed)

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Tool Use - Subactivities

• F Fasten assemble with fingers/tool
• L Loosen disassemble with fingers/tool
• C Cut separate, divide with sharp tool
• S Surface treat apply or remove material from
  the surface of an object
• M Measure compare physical characteristics of
  object with standard
• R Record record info with pen/pencil
• T Think eye actions or mental activity to
  obtain info or to inspect object

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Equipment Use - Subactivities

• W Keyboard/Typewriter use mechanical or
  electronic data entry device
• K Keypad use alphanumeric keypad such as on a
  PDA or telephone
• H Letter/Paper Handling performance of various
  paper filing and sorting operations

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Tool/Equipment Use
A Action distance B Body motion G Gain
control P Placement
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MOST Tool Use -1
ABG ABP tool placement prior to use
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MOST Tool Use 2
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Ex 6 Tool Use (Fasten/Loosen)

• Obtain a nut from a parts bin located within
  reach, place it on the bolt, and run it down with
  seven finger actions.

?IV 111310 16, 16x10 160 TMUs
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Ex 7 Tool Use (Fasten/Loosen)

• From a position in front of an engine lathe,
  obtain a large T-wrench located five steps away,
  loosen one bolt on the lathe with both hands,
  using five arm actions. Set aside T-wrench
  (within reach).

?IV 1011032411 50, 50x10 500 TMUs
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MOST Tool Use 3
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Ex 8 Tool Use (Cut)

• An operator picks up a knife from a bench two
  steps away, makes one cut across the top of a
  cardboard box, and sets aside knife on the bench.

?IV 3131331 15, 15x10 150 TMUs
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Ex 9 Tool Use (Surface Treat)

• Before marking off a piece of sheet metal for a
  cutting operation, the operator takes a rag from
  his pocket and wipes (5x) an oily film from the
  surface.

111132 11 38, 38x10 380 TMUs
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Ex 10 Tool Use (Measure)

• Before welding two steel plates, a welder obtains
  a square and checks the angle between the plates.
  The square is 3 steps away on a bench.

61611061 31, 31x10 310 TMUs