Ergonomic Chair Analysis and Redesign

Objective

Each student was supposed to individually choose an existing ergonomic office chair, evaluate its ergonomic success, and create an improved design.

Skills, Software, and Applied Knowledge

- Working knowledge of ergonomics

- Ability to decipher anthropomorphic data and accommodate a wide range of the population (with purchasing power)

Process

References

Based on knowledge gained from lectures, research into ergonomics, and anthropometric values found in the Gordon 2012 ANUSRII standards, I analyzed and redesigned the Modway Ergonomic Chair.

Original Design Anthropomorphic Analysis

Sex	Anthropomorphic Range Accommodated
Male	2nd +
Female	40th +

Redesign and Comparison

Notes

- Bolded arrows denote adjustable features.

- The shaded region is an embedded lumbar support cushion.

- Seat width = 20 inches

- A = Spans 13.5" - 20"

- B = Spans 20.5" - 25.5" (if A is 13.5")

Feature	Redesign	Original Design
Seat Height Range	13.5" to 20"	15" to 19.5"
Seat Depth	Adjustable seat depth	20 inches, non-adjustable
Seat Width	20"	19"
Headrest	Not included in design	None available in design or as an add-on
Lumbar Support	Adjustable support embedded in chair	Stationary, non-adjustable
Armrests	Adjustable up and down (7" variability), from side to side, and forwards and backwards	No rotation or movement capabilities

Comments

The previous chair largely neglected the female population's anthropometry. Greater variability in adjustability and the addition of some new features will drastically improve this product's ergonomic potential.