What should be confirmed about the supplier's approved ITPs during the inspection process?

The most critical aspect to confirm about the supplier's approved Inspection Test Plans (ITPs) during the inspection process is that they are being used and followed. This ensures that the supplier adheres to the agreed-upon quality assurance processes and that the necessary checks and tests are conducted as stipulated in the ITPs. Compliance with the ITP demonstrates that the supplier is actively engaging in quality control measures to deliver products or services that meet the required standards.

Ensuring that the ITPs are followed during inspection helps maintain consistency in quality, mitigates risks, and reinforces the integrity of the supplier's processes. This practice is essential for building trust between the purchaser and the supplier while also facilitating accountability and clear documentation of adherence to standards.

While the other options may be beneficial to some extent, such as keeping the ITPs updated or publicized, and collecting customer feedback, they do not directly address the immediate requirement of confirming that the plans are actively being implemented during the inspection process. Therefore, the emphasis on usage and adherence to the ITPs is fundamental to effective quality management in supplier relationships.