In mathematics, and more specifically in naive set theory, the domain of definition (or simply the domain) of a function is the set of input or argument values for which the function is defined. That is, the function provides an output or value for each member of the domain.iven a function f: X â Y, the set X is the domain of f; the set Y is the codomain of f. In the expression f (x), x is the argument and f (x) is the value. One can think of an argument as an input to the function, and the value as the output.
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RACI Matrix. ~ By Duncan Haughey. Delegation is an essential part of a project manager's role, so identifying roles and responsibilities early in a project is important. Applying the RACI model can help. As project manager it is important that you set the expectations of people involved in your project from the outset. Projects require many people's involvement, but how do you avoid a situation where people are struggling against one another to do a task.