Below is a part of Heidegger’s famous text, “The Question Concerning Technology”, on Techne, Epistinio, Poiesis;

Revealing

“… We are questioning concerning technology, and we have arrived now at Aletheia, at revealing. What has the essence of technology to do with revealing? The answer: everything. For every bringing-forth is grounded in revealing. Bringing forth, indeed, gathers within itself the four modes of occasioning – causality – and rules them throughout. Within its domain belonging to end and means belongs to instrumentality. Instrumentality is considered to be the fundamental characteristic of technology. If we inquire, step by step, into what technology, represented as means, actually is, then we shall arrive at revealing. The possibility of all productive manufacturing lies in revealing.

Technology is therefore no mere means. Technology is a way of revealing. If we give heed to this, then another whole realm for the essence of technology will open itself up to us. It is the realm of revealing, i.e., of truth. This prospect strikes us as strange. Indeed, it should do so, should do so as persistently as possible and with so much urgency that we will finally take seriously the simple question of what the name “technology” means. The word stems from Greek. Technikon means that which belongs to techne. We must observe two things with respect to the meaning of this word. One is that techne is the name not only for the activities and skills of the craftsman but also for the arts of the mind and the fine arts. Techne belongs to bringing forth, poiesis; it is something poetic.

Bringing-forth

The other point that we should observe with regard to techne is even more important. From earliest times until Plato, the word techne is linked with the word epistinio. Both words are names for knowing in the widest sense. They mean to be entirely at home in something, to understand and be an expert in it. Such knowing provides an opening up. As an opening up it is revealing. Aristotle, in a discussion of special importance (Nicomachean Ethics, Bk. VI, chaps. 3 and 4), distinguishes between episteme and techne and indeed with respect to what and how they reveal. Techne is a mode of alitheuein. It reveals whatever does not bring itself forth and does not yet lie here before us, whatever can look and turn out now one way and now another.

Whoever builds a house or a ship or forges a sacrificial chalice reveals what is to be brought forth, according to the perspectives of the four modes of occasioning. This revealing gathers together in advance the aspect and the matter of ship or house, with a view to the finished thing envisioned as completed, and from this gathering determines the manner of its construction. Thus what is decisive in techne does not lie at all in making and manipulating nor in the use of means, but rather in the aforementioned revealing. It is as revealing, and not as manufacturing, that techne is a bringing-forth.”

Heidegger, (1950), “The Question Concerning Technology”, p.12-13, Harper Torchbook

Conclusion: Techne Epistinio Poiesis

He seems to be one of the gods of architects nowadays. Thus, there is even a book titled “Heidegger for Architects”. Of course, it is very difficult to understand the idea of Techne Epistinio Poiesis, with just a couple of paragraphs. You can read the rest on this website. But be patient if you are not familiar with his philosophy. And this website, explains how to read it.