IE386_Lecture10__18Oct2011

IE386_Lecture10__18Oct2011 - SCHOOL OF INDUSTRIAL...

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SCHOOL OF INDUSTRIAL ENGINEERING Modeling – Therbligs, synthetic data  systems, GOMS, task analysis IE386
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SCHOOL OF INDUSTRIAL ENGINEERING Methods Task analysis Not a specific method – there are many of them Methods are usually vague Outputs do not take a specific form General – can be applied to any type of task. Predetermined time systems Therbligs, MTM, GOMS, etc. Identify elemental motions, sum predetermined times to get task time Time studies Specific to task/population, does not use predetermined times Determine sampling interval Time tasks for the sample
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SCHOOL OF INDUSTRIAL ENGINEERING Therbligs Describe (model) materials handling using elemental motions Do “A,” then do “B,” then do “C” = done Named after Frank Gilbreth Productive  therbligs Grasp  object Finger touch Palm touch Hook grip Power grip Reach  with an empty hand Move hand  while holding an object Release  held object Use  a tool (e.g., screwdriver) Assemble , by placing one object into or onto another object
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SCHOOL OF INDUSTRIAL ENGINEERING Therbligs Describe (model) materials handling using elemental motions Do “A,” then do “B,” then do “C” = done Named after Frank Gilbreth Productive  therbligs Grasp  object Finger touch Palm touch Hook grip Power grip Reach  with an empty hand Move hand  while holding an object Release  held object Use  a tool (e.g., screwdriver) Assemble , by placing one object into or onto another object
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SCHOOL OF INDUSTRIAL ENGINEERING Therbligs Unproductive  therbligs Select  from among two or more objects Search  by hunting for an object with eyes, hands, or both Find  an object (often treated as identical to search) Hold Inspect  an object Disassemble Pre-position  an object Delay Almost never productive and almost always can/should be avoided Almost never productive and may be dangerous May be necessary for product quality In general – eliminate waste by removing unproductive motions
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SCHOOL OF INDUSTRIAL ENGINEERING Motion analysis and methods improvement
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This note was uploaded on 01/17/2012 for the course IE 370 taught by Professor Cheng during the Spring '11 term at Southwestern.

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IE386_Lecture10__18Oct2011 - SCHOOL OF INDUSTRIAL...

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