According to ISO 9001:2015, clause 9.1.1, the organization is required to determine what needs to be monitored and measured, the methods for monitoring, measurement, analysis and evaluation, as applicable, to ensure valid results, and when the monitoring and measuring shall be performed. The organization is also required to retain appropriate documented information as evidence of the results.
Therefore, in the scenario given, the organization should have planned for monitoring and measuring the billet temperature, as it is a critical factor for the quality of the product and the process. The organization should also have established a procedure that provides instruction in taking billet temperature, using the pyrometer or other suitable methods, to ensure consistency and accuracy. The organization should also have performed periodic analysis of the results of temperature checks, to identify trends, problems, and opportunities for improvement.
Hence, the options that would provide evidence of conformance with clause 9.1.1 of ISO 9001 are A, E, and F, as they are aligned with the requirements of the clause. The other options are either irrelevant or not directly related to clause 9.1.1, as they do not pertain to the monitoring and measurement of the billet temperature.
References:
ISO 9001:2015(en), Quality management systems - Requirements, clause 9.1.1 ISO 19011:2018(en), Guidelines for auditing management systems, clause 6.4.4 and 6.7.2 ISO 9001 Lead Auditor Training Course | IRCA Certified | BSI, section "Learning objectives" ISO 9001 Lead Auditor Course Material | 3FOLD Education Centre, module 5 and 6