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The [[“Normalization'''Normalization Process Model”]]Model''' is a theory that explains how new technologies are embedded in health care work <ref>May, C. 2006. "A rational model for assessing and evaluating complex interventions in health care." BMC Health Services Research 6: 1-11.[http://www.biomedcentral.com/1472-6963/6/86].</ref>. The model was developed by [[Carl R May]] and co-workers <ref>Finch, T. L., F. S. Mair, and C. R. May. 2007. "Teledermatology in the UK: lessons in service innovation." British Journal of Dermatology 156: 521-527; May, C., M. Mort, T. Williams, F.S. Mair, and L. Gask. 2003a. "Health Technology Assessment in its local contexts: studies of telehealthcare." Social Science and Medicine 57: 697-710; May, C.R., R. Harrison, T. Finch, A. MacFarlane, F.S. Mair, and P. Wallace. 2003b. "Understanding the normalization of telemedicine services through qualitative evaluation." Journal of the American Medical Informatics Association 10: 596-604.</ref>, and is an empirically derived [[grounded theory]] in [[medical sociology]] and [[Science and technology studies(STS)]], based on [[qualitative methods]]. Carl May developed the model after he appeared as a witness at a [[British House of Commons]] Health Committee Inquiry on New Medical Technologies in the NHS in 2005 <ref>House of Commons Health Committee. (2005) Inquiry on New Medical Technologies in the NHS. [http://www.parliament.the-stationery-office.com/pa/cm200405/cmselect/cmhealth/398/39802.htm]</ref>. He asked how new technologies became routinely embedded, and taken-for-granted, in everyday work, in view of the increasing corporate [[organization]] and [[regulation]] of [[healthcare]]<ref>May, C. 2007. "The clinical encounter and the problem of context." Sociology 41: 29-45.</ref>. Articles about the model have mainly been published in [[BioMed Central]] [[open access publishing]] [[academic journals]].
The Normalization Process Model provides a framework for process evaluation and also for comparative studies of complex interventions, especially of [[randomized controlled trials]]. Clinical trials and other evaluations of healthcare interventions often focus on the complex relationships between actors, objects and contexts, making a simple explanatory model, that fits well with other frameworks a necessary tool for clinical and health service researchers. In the Normalization Process Model, A complex intervention is defined as a deliberately initiated attempt to introduce new, or modify existing, patterns of collective action in health care. A complex intervention has three kinds of components <ref>May, C, FS Mair, C Dowrick, and T. 2007b. "Process evaluation of complex interventions in primary care: understanding trials using the normalization process model." BMC Family Practice 8</ref>:
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