What is the scope of the appointed expert's mission in a preliminary evidentiary action concerning artistic or engineering works?

The mission of the appointed expert in a preliminary evidentiary action is limited to inventorying the quantity of work performed in the matter subject to proof, the materials supplied therein, and the tools used for it, and accurately describing the essence and nature of all of that, without addressing its valuation, providing a technical judgment on it, or identifying the party responsible for any defect or deficiency, if found.