Ergonomics

Definition

Ergonomics is, in Broadbent's chapter definition (1973, citing Murrell and McCormick): "method of establishing standards in which certain aspects of the physical environment (independent variables, such as illumination levels, noise levels, temperature, air movement, etc.) are subject to controlled variations. The effects of these variations on human performance are measured in terms of 'comfort', output, efficiency, etc., (the dependent variables) analysed statistically and used in the drawing of inferences about human performance in general or as a basis for design." It is the human-science method that survived the modernist standards programme: standards for the body, established by controlled experiment rather than asserted.

Key Claims

The proven zone of statistical standardization. Physiological limits can be established: ranges outside which 90%, 80%… 10% of humans would die, and comfort ranges within them — though "it will never be possible to establish a simple temperature at which everyone, dark-skinned or light, brought up at the Equator or in the Arctic Circle, would feel comfortable." Ergonomics is the discipline of that difference.
Standards from variation, not decree. Where the modernist standards programme asserted needs ("All men have the same needs"), ergonomics produces standards by subjecting environmental variables to "controlled variations" and measuring their effects — the empiricist form of standardization.
The design context. In the wiki's domestic-register materials, ergonomics appears as the measurement discipline behind interiors: Callaghan & Palmer's 1944 industrial-engineering chore studies aiming at "the basis of house design… for ergonomically improved domestic interiors" (Weinthal), and Saarinen's carpet as "a charged zone of ergonomic action in the human body" (Wagner).

Key Thinkers

Geoffrey Broadbent — the definition's source: ergonomics as the human science with demonstrated results usable in design.
K. F. H. Murrell; Ernest McCormick (not yet paged — see log) — the discipline's founders cited in the definition.

Comfort — the dependent variable: what the controlled variations are measured against.
Standardization — the programme ergonomics grounds empirically.
Empirical Methods — the broader observational register to which ergonomics belongs.
Environmental Psychology — the neighbouring human-science field of the same 1960s–70s turn.

Source Support

Sources in the wiki that discuss this concept:

Design in Architecture, ch. 4 (Broadbent 1973) — the definition (Murrell, McCormick); the physiological-limits argument for what statistics can legitimately fix; ergonomics in the alphabetical catalogue of the human sciences as the designer's possible information sources.
A pirouette on the orthographic hinge (Weinthal 2018) — ergonomics as domestic design's empirical base: Callaghan & Palmer's 1944 studies documenting "the moving body… before making assumptions about the programmed interior," aiming at "ergonomically improved domestic interiors." See space-shape.
Ultrasuede (Wagner 2002/2006) — the ergonomic register of comfort: the floor-to-tabletop region as "a charged zone of ergonomic action in the human body." See enclosure, repose.

Open Questions

Does ergonomics' success within physiological limits license its extension to psychological "comfort" (the terms Broadbent puts in quotes), or does the extension repeat the standards programme's error at a new level?
Can ergonomics design for delight as well as comfort — Broadbent's own demand that the architect designing for "thermal and aural delight" also design "for visual delight"?
Stub — requires fuller treatment of the discipline's own history (Murrell, McCormick, the Ergonomics Society) and its architectural uptake after 1973.