Editing Learning curve (section)

=== History ===
[[File:Learning curve cycle.png|thumb|]]
In 1936, [[Theodore Paul Wright]] described the effect of learning on [[production costs]] in the [[aircraft industry]] and proposed a mathematical model of the learning curve.<ref name="Wright, T.P. 1936"/>

In 1952, the US Air Force published data on the learning curve in the [[airframe]] industry from 1940 to mid-1945.<ref>Air Materiel Command Wright-Patterson AFB OH. "[https://purl.stanford.edu/dg041ny3484 Source Book of World War II Basic Data-Airframe Industry. Volume 1. Direct Man-Hours-Progress Curves]." (1952): 0201.</ref> Specifically, they tabulated and plotted the direct man-hour cost of various products as a function of cumulative production. This formed the basis of many studies on learning curves in the 1950s.<ref>Asher, H. (1956). ''Cost-quantity relationships in the airframe industry'' (Doctoral dissertation, The Ohio State University).</ref>

In 1968 [[Bruce Henderson]] of the [[Boston Consulting Group]] (BCG) generalized the Unit Cost model pioneered by Wright, and specifically used a [[Power Law]], which is sometimes called ''Henderson's Law''.<ref>{{Cite web |title=What is Henderson's Law? |url=http://www.davidrusseltrask.com/what-is-hendersons-law |website=Henderson's Law |language=en-US |access-date=2020-06-02}}</ref> He named this particular version the '''experience curve'''.<ref>
Henderson, Bruce (1968-01-01) [https://www.bcgperspectives.com/content/Classics/strategy_the_experience_curve/ The Experience Curve]. ''Boston Consulting Group''</ref><ref name="Grant2003">{{Citation |last=Grant |first=Robert M. |title=Contemporary strategy analysis |year=2004 |publisher=Blackwell publishing |location=US, UK, Australia, Germany |isbn=1-4051-1999-3 |url-access=registration |url=https://archive.org/details/contemporarystra00gran_4 }} <!-- note first published in 1991 --></ref>
Research by BCG in the 1970s observed [[experience curve effects]] for various industries that ranged from 10 to 25 percent.<ref name="HaxMajluf">{{Citation
  | last1 = Hax
  | first1 = Arnoldo C.
  | last2 = Majluf
  | first2 = Nicolas S.
  | title = Competitive cost dynamics: the experience curve
  | journal = Interfaces
  | volume = 12
  | issue = 5| pages = 50–61
  | date = October 1982
  | doi = 10.1287/inte.12.5.50 | s2cid = 61642172
 }}</ref>