Which action is advisable after noticing discrepancies in an installation?

Contacting the customer for clarification is crucial after noticing discrepancies in an installation. This action ensures that any confusion or misunderstanding about the installation can be addressed directly with those who are directly affected, leading to a more accurate resolution.

By reaching out to the customer, you can gather their perspective on the installation requirements and confirm whether the discrepancies align with their expectations or specifications. This open line of communication can prevent future miscommunications and ensure that the final product meets the customer's needs and satisfies applicable codes and standards.

Furthermore, obtaining clarification can help avoid unnecessary work and possible liability issues that might arise from unilateral decisions made without customer input. Engaging the customer in discussions about discrepancies fosters trust and understanding, which is vital for maintaining a good working relationship.

Simultaneously, documenting the discrepancies and any communications with the customer is also a best practice, as it provides a record for future reference and can help in troubleshooting and addressing similar issues that may arise on future projects.