Forcing function
Forcing function can mean:
  • In differential calculus, a Forcing function (differential equations)
    Forcing function (differential equations)
    In a system of differential equations used to describe a time-dependent process, a forcing function is a function that appears in the equations and is only a function of time, not of any of the other variables. In effect, it is a constant for each value of t....

  • In interaction design, a behavior-shaping constraint
    Behavior-shaping constraint
    A behavior-shaping constraint, also sometimes referred to as a forcing function or poka-yoke, is a technique used in error-tolerant design to prevent the user from making common errors or mistakes. One example is the reverse lockout on the transmission of a moving automobile.The microwave provides...

    , a means of preventing undesirable user input usually made by mistake.
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