Systems theory
Both TEA and TED rely on systems theory, a perspective that conceptualizes society in terms of events and occurrences resulting from investigating system operations. Systems theory assumes that complex ideas can be studied as systems with common designs and properties which can be further explained using systems methodology. The field of technoethics regards technologies as self-producing systems that draw upon external resources and maintain themselves through knowledge creation; these systems, of which humans are a part, are constantly in flux as relations between technology, nature, and society change. TEA attempts to elicit the knowledge, goals, inputs, and outputs that comprise technological systems. Similarly, TED enables designers to recognize technology's complexity and power, to include facts and values in their designs, and to contextualize technology in terms of what it makes possible and what makes it possible.