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Psy 552 Ergonomics & Biomechanics

This lecture on ergonomics and biomechanics, Lecture 15, delves into the Multitask Equations and Procedure. The procedure considers the collective effects of all tasks, calculating the cumulative effects as the Sum of the Change in LI. You will learn how to compute the Frequency-Independent Recommended Weight Limit (FIRWL), Single-Task Recommended Weight Limit (STRWL), Frequency-Independent Lifting Index (FILI), Single-Task Lifting Index (STLI), and Composite Lifting Index (CLI) for each task. An example illustrates the application of multitasking principles in ergonomic assessment.

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Psy 552 Ergonomics & Biomechanics

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  1. Psy 552 Ergonomics & Biomechanics Lecture 15

  2. The Multitask Equations • The multitask procedure considers the collective effects of all the tasks. • The procedure calculates the cumulative effects defined as:

  3. Sum of the Change in LI

  4. The multitask procedure • 1. Compute the Frequency-Independent Recommended Weight Limit (FIRWL) and Single-Task Recommended Weight Limit (STRWL) for each task. • 2. Compute the Frequency-Independent Lifting Index (FILI) and Single-Task Lifting Index (STLI) for each task. • 3. Compute the Composite Lifting Index (CLI) for the overall job.

  5. Multitask Example

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