1 / 13

IE 419 Work Design: Productivity and Safety Dr. Andris Freivalds Class #11

IE 419 Work Design: Productivity and Safety Dr. Andris Freivalds Class #11. Motion Study (pp. 148-153). Detailed analysis of motions in operation Developed by Gilbreths (bricklaying) Goals: Increase productivity By eliminating ineffective motions Improving (faster) effective motions

suzuki
Download Presentation

IE 419 Work Design: Productivity and Safety Dr. Andris Freivalds Class #11

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. IE 419 Work Design:Productivity and Safety Dr. Andris Freivalds Class #11 IE 419

  2. Motion Study (pp. 148-153) • Detailed analysis of motions in operation • Developed by Gilbreths (bricklaying) • Goals: • Increase productivity • By eliminating ineffective motions • Improving (faster) effective motions • 17 fundamental motions (therbligs) IE 419

  3. IE 419

  4. IE 419

  5. Two-Hand Process (Simo) Chart(Used toAnalyze Motions in Operation) IE 419

  6. IE 419

  7. IE 419

  8. Therbligs & Two-Hand Process Chart Conclusions: Basis for Predetermined Time Systems! IE 419

  9. Predetermined Time Systems (Ch. 13, pp. 468-470, 475-484, 504-508) PTS – technique for obtaining a standard time (vs. time study, work sampling) via: • Analyze and subdivide a task into elemental motions (therbligs) • Assign pre-set time values for these elements • Summate times to obtain a standard time for whole task (no direct timing) IE 419

  10. History of PTS • Based on Gilbreths’ therbligs • Time added in for each therblig • First – Work Factor in 1930’s • Now over 200 PTS systems • Focus on MTM based ones IE 419

  11. Methods Time Measurement (MTM) • Maynard, Stegemerten, Schwab in 1940s • Westinghouse jobs, broken down into elements, rated, timed • Time Measurement Unit (TMU) = 0.00001 hr = 0.0006 min = 0.036 sec • Main variations: tradeoff of speed & accuracy = MTM-1, 2, 3 • Specialized variations for jobs: MTM-C for clerical, MTM-V for machines, MTM-M for magnification IE 419

  12. Comparison of MTM-1,-2,-3 IE 419

  13. Accuracy vs. Length of Cycle IE 419

More Related