This is a deliberately provocative question.
The scientific method is clear - the facts must be clearly established, the assumptions (or axioms) clearly stated, and the theory must be repeatedly demonstrable in practice by other researchers working independently.
The same basic principles apply in the associated branches of engineering, otherwise it would be impossible to manufacture any product to a consistent standard.
In the physical sciences (physics, chemistry etc) we have engineers (electrical, mechanical, chemical etc) who make use of the science to fabricate maintain and (occasionally) repair the useful products that we have now carelessly come to take for granted.
In the medical sciences we have . . . ...