You appear to be getting at the concept of Tacit Knowledge.
Collins showed [10] that a particular laser (The ppTEA laser) was designed in America and the idea, with specific assistance from the designers, was gradually propagated to various other universities world-wide. However, in the early days, even when specific instructions were sent, other labs failed to replicate the laser, it only being made to work in each case following a visit to or from the originating lab or very close contact and dialogue. It became clear that while the originators could clearly make the laser work, they did not know exactly what it was that they were doing to make it work, and so could not articulate or specify it by means of monologue articles and specifications. But a cooperative process of dialogue enabled the tacit knowledge to be transferred.
I expect that part of what I'm talking about is tacit knowledge, but I bet that some of it is explicit but localized knowledge. The knowledge (whether tacit or explicit) remains local partly because no one is interested in hearing about it-- too arcane for the lay public, too low status for scientists, partly because a lot of it is trade secrets and/or requires a security clearance, and partly because it's highly specific, which means it gets forgotten if a project or technology is abandoned.
Science is not particularly reliable.
And yet, we have remarkable technology, and can do medical marvels.
My tentative theory is that there's a lot of knowledge that's less formal than science in engineering, manufacturing, and the practice of medicine which makes it possible to get work done, and some fairly effective methods of filtering information that comes from science.