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Mass customization, in marketing, manufacturing, call centres and management, is the use of flexible computer-aided manufacturing systems to produce custom output. Such systems combine the low unit costs of mass production processes with the flexibility of individual customization.
Mass customization is the new frontier in business for both manufacturing and service industries. At its core is a tremendous increase in variety and customization without a corresponding increase in costs. At its limit, it is the mass production of individually customized goods and services. At its best, it provides strategic advantage and economic value.
In reference to technological products, the following statement of Piyush Mathur (2017) is illuminating here:
Mass customization...is not merely about tailoring a technology to the needs of the idiosyncratic user (which is the case with customization); rather, it is about pretailoring the technology to the idiosyncrasies of every user. 
Mass customization is the method of "effectively postponing the task of differentiating a product for a specific customer until the latest possible point in the supply network". Kamis, Koufaris and Stern (2008) conducted experiments to test the impacts of mass customization when postponed to the stage of retail, online shopping. They found that users perceive greater usefulness and enjoyment with a mass customization interface vs. a more typical shopping interface, particularly in a task of moderate complexity. From collaborative engineering perspective, mass customization can be viewed as collaborative efforts between customers and manufacturers, who have different sets of priorities and need to jointly search for solutions that best match customers' individual specific needs with manufacturers' customization capabilities.
The concept of mass customization is attributed to Stan Davis in Future Perfect and was defined by Tseng & Jiao (2001, p. 685) as "producing goods and services to meet individual customer's needs with near mass production efficiency". Kaplan & Haenlein (2006) concurred, calling it "a strategy that creates value by some form of company-customer interaction at the fabrication and assembly stage of the operations level to create customized products with production cost and monetary price similar to those of mass-produced products". Similarly, McCarthy (2004, p. 348) highlights that mass customization involves balancing operational drivers by defining it as "the capability to manufacture a relatively high volume of product options for a relatively large market (or collection of niche markets) that demands customization, without tradeoffs in cost, delivery and quality".
Many implementations of mass customization are operational today, such as software-based product configurators that make it possible to add and/or change functionalities of a core product or to build fully custom enclosures from scratch. This degree of mass customization, however, has only seen limited adoption. If an enterprise's marketing department offers individual products (atomic market fragmentation) it doesn't often mean that a product is produced individually, but rather that similar variants of the same mass-produced item are available. Additionally, in a fashion context, existing technologies to predict clothing size from user input data have been shown to be not yet of high enough suitability for mass customisation purposes.
Companies that have succeeded with mass-customization business models tend to supply purely electronic products. However, these are not true "mass customizers" in the original sense, since they do not offer an alternative to mass production of material goods.
- Collaborative customization (also considered co-creation) – Firms talk to individual customers to determine the precise product offering that best serves the customer's needs (see personalized marketing and personal marketing orientation). This information is then used to specify and manufacture a product that suits that specific customer. For example, some clothing companies will manufacture pants or jackets to fit an individual customer. This is also being taken into deeper customization via 3D printing with companies like Shapeways. Examples: Tailored suits; Converse lets consumers chose the color or pattern of every element of certain types of shoes, either in-store or online.
- Adaptive customization – Firms produce a standardized product, but this product is customizable in the hands of the end-user (the customers alter the product themselves). Example: Lutron lights, which are programmable so that customers can easily customize the aesthetic effect.
- Transparent customization – Firms provide individual customers with unique products, without explicitly telling them that the products are customized. In this case there is a need to accurately assess customer needs. Example: Google AdWords and AdSense
- Cosmetic customization – Firms produce a standardized physical product, but market it to different customers in unique ways. Example: Soft Drink served in: A can, 1.25L bottle, 2L bottle.[clarification needed]
- B. Pine II, Joseph (1993). Masse Customization – The New Frontier in Business Competition. Harvard Business School Press. ISBN 0-87584-372-7.
- Mathur, Piyush (2017). Technological Forms and Ecological Communication: A Theoretical Heuristic. Lexington Books. ISBN 978-1498520478.
- Chase, Richard B.; Jacobs, F. Robert; Aquilano, Nicholas J. (2006). Operations Management for Competitive Advantage (11th ed.). New York: McGraw-Hill/Irwin.
- Kamis, Arnold; Koufaris, Marios; Stern, Tziporah (March 2008). "Using an attribute-based DSS for user-customized products online: An experimental investigation". MIS Quarterly. 32 (1): 159–177.
- Chen, Songlin; Wang, Yue; Tseng, Mitchell (2009). "Mass Customization as a Collaborative Engineering Effort". International Journal of Collaborative Engineering. 1 (2): 152–167. doi:10.1504/ijce.2009.027444.
- Mass Customisation – Overview Archived 2012-09-07 at Archive.today
- JANUSZKIEWICZ, Monika; Parker, Christopher J.; Hayes, Steven G.; Gill, Simeon (2017). "Online Virtual Fit is not yet Fit for Purpose: An Analysis of Fashion e-Commerce Interfaces". 3DBODY.TECH 2017: 210–217. doi:10.15221/17.210. Retrieved 26 April 2018.
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- Kaplan, A.M; Haenlein, M (2006). "Toward a parsimonious definition of traditional and electronic mass customization". Journal of product innovation management. 23 (2).
- "The Manufacturing Process Of Custom Neckties". Shop4Ties. Retrieved 4 January 2015. – detailed look at mass custom manufacturing of ties
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- Noguchi, M.; Hernàndez-Velasco, C.R. (2005). "A 'mass custom design' approach to upgrading conventional housing development in Mexico". Habitat International. 29 (2).
- Duarte, J.P. (2001) "Customizing Mass Housing: a discursive grammar for Siza's houses at Malagueira", PhD Dissertation, Massachusetts Institute of Technology
- Blecker, T.; Abdelkafi, N.; Kreutler, G.; Kaluza, B.: Auction-based Variety Formation and Steering for Mass Customization, in: Electronic Markets, 14, 3, 2004, pp. 232–242.
- Coletti, P.; Aichner, T. (2011). Mass Customization: An Exploration of European Characteristics. Heidelberg, Germany: Springer. ISBN 978-3-642-18389-8.