Which of the following is an example of tacit knowledge?

A risk register is explicit knowledge - it is formally documented information stored in a written artifact that can be shared and referenced by others.

Project requirements are explicit knowledge captured in requirements documentation and a requirements traceability matrix, making them readily shareable in written form.

Expert judgment is tacit knowledge because it stems from an individual's accumulated experience, intuition, and internalized expertise that cannot easily be written down or transferred directly. Unlike explicit knowledge stored in documents, expert judgment resides in a person's mind and is shared through interaction, mentoring, and storytelling.

Make-or-buy analysis is an analytical technique that produces documented outputs, classifying it as explicit rather than tacit knowledge.