Reliable CNC work starts with controlled information. A toolpath can only reflect the geometry, material, tooling and workshop decisions behind it, so those inputs need to be clear before machining strategy is prepared.
Confirm the source and revision
The CNC work should be tied to the intended project revision and exact source information. A later drawing or file should not silently replace the information used for an earlier controlled output.
Check the manufacturing geometry
Part sizes, shapes, faces, edges, holes, pockets and other machining intent need to be complete enough for the agreed task. Missing or unclear information stays visible as a question.
Use the real material and setup
Sheet or component specification, thickness, holding method and machine setup affect what can be machined safely and accurately. These are workshop facts, not values to be guessed from a drawing.
Match tooling to the operation
Tool choice, diameter, cutting depth, pattern and face convention must match the actual workshop configuration. A generic or assumed tool reference is not the same as a checked setup.
Review before release
The agreed review should confirm the source revision, outstanding questions, material, tooling and intended output. Final workshop approval remains with the authorised person using the real machine and process.