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IE 419 1 Work Design: Productivity and Safety Dr. Andris Freivalds Class #15.

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Presentation on theme: "IE 419 1 Work Design: Productivity and Safety Dr. Andris Freivalds Class #15."— Presentation transcript:

1 IE Work Design: Productivity and Safety Dr. Andris Freivalds Class #15

2 IE Work Design: Productivity and Safety Dr. Andris Freivalds Class #15

3 IE Basics of Basic MOST Only three activity sequences: 1)General Move Movement of object freely through space ½ of all work sequences 2)Controlled Move Movement of object attached to another or in contact with a surface ⅓ of all work sequences 3)Tool/Equipment Use 1/6 of all work sequences

4 IE General Move - Basics Has 4 subactivities: 1)A = Action distance (horizontal) 2)B = Body motion (vertical) 3)G = Gain control (i.e. GET cases A, B, C) 4)P = Placement (i.e. PUT cases A, B, C) Grouped into 3 phases: 1)Get – reach and gain control of object 2)Put – move object to new location 3)Return – distance walked back to workstation, not for hands

5 IE General Move GetPutReturn A B GA B PA A = Action distance B = Body motion G = Gain control P = Placement Obtain Index Values based on characteristics Sum Index Values, multiply by 10 → TMUs

6 IE Controlled Move – Typical Steps 1)Reach some distance with hands for object, perhaps with body motion or steps 2)Gain manual control of object 3)Move object over a controlled path, perhaps with body motion or steps 4)Allow time for control (a process) to occur 5)Align object at end of process time 6)Return to workplace (if needed)

7 IE Controlled Move - Basics Has 3 new subactivities: 1)M = Move controlled (path is controlled) 2)X = Process Time (controlled by mechanical devices, not manual actions) 3)I = Alignment (conclusion of process to achieve alignment of objects) Grouped into 3 phases: 1)Get and 3) Return as before 2)Move over controlled path or actuate device

8 IE Controlled Move GetMove/ActuateReturn A B GM X IA A = Action distance B = Body motion G = Gain control M = Move controlled X = Process Time I = Alignment

9 IE MOST - Controlled Move

10 IE Ex #2 - Controlled Move GetMove/ActuateReturn A 1 B 0 G 1 M 1 X 10 I 0 A0A0 A 1 = Reach to lever (within reach) B 0 = No body motion G 1 = Gain control of lever M 1 = Move lever (< 12 in.) to engage X 10 = Process time of ~3.5 sec I 0 = No alignment A 0 = No return Engage a feed lever on a milling machine. ∑IV = = 13, 13x10 = 130 TMUs

11 IE Controlled Move - Parameter Indexing Move Controlled (M) M 1 one stage ≤ 12 in –or press button/switch/knob M 3 one stage > 12 in –or push/pull with resistance –or seat/unseat –or high control –two stages ≤ 24 in M 6 two stages > 24 in –or with 1-2 steps M stages –or 3-4 steps M steps Extended values Note: Applies to feet also, Ex. Push pedal > 12 in → M 3

12 IE Move Controlled - Crank Crank: –move fingers, wrist, forearm –in circular path –more than ½ revolution –< ½ rev → push/pull/pivot M 3 = 1 rev M 6 = 2-3 rev M 10 = 4-6 rev M 16 = 7-11 rev

13 IE Controlled Move – Process Time Index ValueSecondsMinutes 0No process time

14 IE Controlled Move – Alignment Line up to a point(s) Single eye focus I 1 to one point in single correcting action I 3 to two ≤ 4 in apart I 6 to two > 4 in apart I 16 with precision

15 IE Controlled Move – Alignment Machining Operations IndexAlign to I3I3 Workpiece I6I6 Scale mark I 10 Indicator dial Nontypical Objects (Flat, large, flimsy) IndexMethod I0I0 Against stop I3I3 1 adjust to stop I6I6 2 adjust to stop 1 adjust to 2 stops I 10 3 adjust to stop 2 adjust to line

16 IE 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. GetMove/ActuateReturn A 3 B 0 G 3 M 3 X 0 I 6 A0A0 ∑IV = = 15, 15x10 = 150 TMUs

17 IE MOST - Controlled Move

18 IE Ex #4 - Controlled Move A material handler takes hold of a heavy carton with both hands and pushes it 18 in. across conveyor rollers. GetMove/ActuateReturn A 1 B 0 G 3 M 3 X 0 I 0 A0A0 ∑IV = = 7, 7x10 = 70 TMUs

19 IE Ex #5 - Controlled Move Using a foot pedal to activate the sewing machine, an operator sews a stitch requiring 3.5 sec process time. GetMove/ActuateReturn A 1 B 0 G 1 M 1 X 10 I 0 A0A0 ∑IV = = 13, 13x10 = 130 TMUs

20 IE Tool/Equipment Use – Typical Steps 1)Get tool a)Reach some distance with hands for tool, perhaps with body motion or steps b)Gain manual control of tool 2)Put tool in place a)Move tool to where it will be used, perhaps with body motion or steps b)Place tool in position for use 3)Use tool: apply tool action 4)Put tool aside, perhaps for later reuse 5)Return to workplace (if needed)

21 IE Tool Use - Subactivities 1)F = Fasten; assemble with fingers/tool 2)L = Loosen; disassemble with fingers/tool 3)C = Cut; separate, divide with sharp tool 4)S = Surface treat; apply or remove material from the surface of an object 5)M = Measure; compare physical characteristics of object with standard 6)R = Record; record info with pen/pencil 7)T = Think; eye actions or mental activity to obtain info or to inspect object

22 IE Equipment Use - Subactivities 1)W = Keyboard/Typewriter; use mechanical or electronic data entry device 2)K = Keypad; use alphanumeric keypad such as on a PDA or telephone 3)H = Letter/Paper Handling; performance of various paper filing and sorting operations

23 IE Tool/Equipment Use GetPut in place UsePut aside Return A B GA B P* A A = Action distance B = Body motion G = Gain control P = Placement

24 IE MOST – Tool Use -1 ABG ABP – tool placement prior to use

25 IE MOST – Tool Use 2

26 IE 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 = = 16, 16x10 = 160 TMUs GetPut in place UsePut aside Return A 1 B 0 G 1 A 1 B 0 P 3 F 10 A 0 B 0 P 0 A0A0

27 IE 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 = = 50, 50x10 = 500 TMUs GetPut in place UsePut aside Return A 10 B 0 G 1 A 10 B 0 P 3 L 24 A 1 B 0 P 1 A0A0

28 IE MOST – Tool Use 3

29 IE 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 = = 15, 15x10 = 150 TMUs GetPut in place UsePut aside Return A 3 B 0 G 1 A 3 B 0 P 1 C3C3 A0A0

30 IE 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 = 38, 38x10 = 380 TMUs A 1 B 0 G 1 A 1 B 0 P 1 S 32 A 1 B 0 P 1 A 0

31 IE 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 = 31, 31x10 = 310 TMUs A 6 B 0 G 1 A 6 B 0 P 1 M 10 A 6 B 0 P 1 A 0


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