Uncertainty modeling is a process that characterizes the sources of uncertainty, propagates the uncertainty through the analyses, and quantifies the effects of the uncertainty on the quantities of interest.

Computer-Aided-Design "Features that fit the end-user needs." (Hoffmann and Joan-Arinyo 1998; 321) [Hoffmann, C. M., & Joan-Arinyo, R. (1998). On user-defined features. Computer-Aided Design, 30(5), 321-332.]

Software "A user interface is a linkage between a human and a device or system that allows the human to interact with (e.g., exchange information with) that device or system." (Linux Information Project 2005; web) [The Linux Information Project. (2005). User Interface Definition. Retrieved from http://www.linfo.org/user_interface.html]

Information-Technology When "stakeholders across the organization have the right expectations regarding the business impact of the technology initiative. Executive management, finance and IT/end-users tend to have different perspectives and goals. If those goals are not aligned, the project will be doomed to failure... Stakeholder alignment must not only exist at the outset — it must be maintained throughout the life of the project." (The SSD Team 2017; web) [The SSD Team. (2017). Stakeholder Alignment: The Critical Foundation of Any IT Initiative. Retrieved from https://www.ssdel.com/it-budgeting-and-planning/stakeholder-alignment-critical-foundation-initiative/]