"An example from soft systems thinking is Checkland's appreciation of soft systems methodology. He wants to introduce hard systems approaches to deal with hard problems only after and through a soft systems analysis."

“Churchman recognized in his critical systemic thinking that the human mind is not able to know the whole. … Yet the human mind, for Churchman, may appreciate the essential quality of the whole. For Churchman, appreciation of this essential quality begins … when first you see the world through the eyes of another. The systems approach, he says, then goes on to discover that every worldview is terribly restricted. Consequently, with Churchman, a rather different kind of question about practice surfaces. … That is, who is to judge that any one bounded appreciation is most relevant or acceptable? Each judgment is based on a rationality of its own that chooses where a boundary is to be drawn, which issues and dilemmas thus get on the agenda, and who will benefit from this. For each choice it is necessary to ask, What are the consequences to be expected insofar as we can evaluate them and, on reflection, how do we feel about that? As Churchman points out, each judgment of this sort is of an ethical nature since it cannot escape the choice of who is to be the client—the beneficiary—and thus which issues and dilemmas will be central to debate and future action. In this way, the spirit of C. West Churchman becomes our moral conscience. A key principle of systemic thinking, according to Churchman, is to remain ethically alert. Boundary judgments facilitate a debate in which we are sensitized to ethical issues and dilemmas.”

“In general, we seem to associate complexity with anything we find difficult to understand.”

“Positivism : knowledge is hard, real, and capable of being transmitted in a tangible form.”

“Cybernetics, although not ignoring formal networks, suggests that an informal communications structure will also be present such that complex conversations at a number of levels between two or more individuals exist.”

“Quality means meeting customers' requirements, formal and informal, at lowest cost, first time every time.”

“If Critical Systems Thinking is to contribute to enlightened societal practice, e.g., with respect to the pressing environmental and social issues of our time, it should be accessible not only to well-trained decision makers and academics but also to a majority of citizens.”