What should you do if in actual field installation does not conform to the drawing?

If the actual field installation does not conform to the drawing, first document the discrepancies by taking photos and notes. Then, communicate with the project team, including engineers and contractors, to discuss the issues and potential impacts on the project. Evaluate whether the deviations can be remedied or if a redesign or modification is necessary. Finally, ensure that any changes are documented and approved through the proper channels to maintain compliance and accountability.