End-to-End (E2E) Lifecycle

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End-to-End (E2E) describes a process that takes a system or service from beginning to end and delivers a complete functional solution, usually without needing to obtain anything from a third party. It often refers to vendors that can see a project through from beginning to end, and supply everything needed to create a workable solution—be it hardware, software, labor, written materials, and procedures. End-to-end solutions also adhere to a philosophy that eliminates as many middle layers or steps as possible, which helps to optimize the performance and efficiency of a business.

Source: https://www.investopedia.com/terms/e/end-to-end.asp