Comprehensive and Detailed In-Depth Explanation:

A horizontal audit examines one process across multiple departments to assess consistency.

Thus, A is the correct answer.

When conducting a third-party audit to ISO 9001, especially in the context of training and corrective actions taken due to customer complaints, the most appropriate audit trails to follow would be:

A. Ask if customer complaints had ceased since the multi-skilled training finished. This audit trail is relevant because it directly relates to the effectiveness of the corrective action taken. If customer complaints have decreased or ceased, it could indicate that the additional training was effective1.

F. Review records to assess if all planned training has been completed. This trail is important to ensure that the training plan has been fully implemented and to verify that all staff members have received the necessary training. It also helps in assessing the adequacy of the training in terms of content, frequency, and outcomes1.

These two trails, A and F, are closely linked to the issue of customer complaints and the organization’s response to them. They provide insight into whether the actions taken were suitable and whether they have led to improvements in staff performance and customer satisfaction1. The other options, while potentially useful, do not directly address the immediate concern of the effectiveness of the corrective actions taken in response to the customer complaints1.

In this scenario, the organization has set a quality objective of achieving a 90% minimum exam pass rate for all courses. The auditor’s task is to assess whether this objective is being monitored effectively and if appropriate actions are taken when the objective is not met.

B. You would determine how the exam pass rate figures were analysed: ISO 9001:2015, particularly Clause 9.1 (Monitoring, measurement, analysis, and evaluation), requires organizations to evaluate performance data. The auditor should verify how the organization analyses the pass rate data to ensure trends are identified, and corrective actions are planned based on this analysis.

D. You would determine what corrective action was being taken to address the low pass rates: When performance falls short of the objective, as seen with Course 4 (where the pass rate is below 90% in all months), Clause 10.2 (Nonconformity and corrective action) requires organizations to take corrective actions to address issues. The auditor would need to check if corrective actions have been initiated to address consistently low pass rates.

Statements A, C, E, and F do not directly address the monitoring and corrective action required under ISO 9001:2015 in this context​​.

In a third-party certification audit, auditors are responsible for maintaining confidentiality as part of their professional duties. Here’s how they can demonstrate it:

A. Adhere to the CQI Professional Code of Conduct: The CQI (Chartered Quality Institute) Code of Conduct outlines ethical principles, including confidentiality. Auditors must adhere to professional standards, ensuring sensitive information is protected and not disclosed improperly.

B. Confirm the confidentiality arrangements with the auditee regarding the use of mobile devices/cameras: Before using mobile devices or cameras, auditors must seek explicit permission from the auditee and agree on confidentiality terms, preventing unauthorized recording or sharing of sensitive information.

Options C, D, and E involve breaching confidentiality and are not acceptable practices in an ISO 9001:2015 certification audit. Sharing sensitive information, removing evidence without consent, or discussing it with unauthorized parties violates audit principles and the standard's confidentiality requirements​.

According to ISO 9001:2015, clause 8.4, an organization is required to control the processes, products and services provided by external providers, including those that affect the quality of the organization’s own products and services. This includes determining the controls to be applied to the external provision of processes, products and services, as well as the information to be communicated to the external providers. The organization is also required to monitor, measure, and evaluate the performance of the external providers and retain documented information of these activities.

Therefore, in the scenario given, ABC Ltd is responsible for controlling the processes, products and services provided by Teak Ltd, as they affect the quality of ABC Ltd’s own products and services. This means that ABC Ltd should have established criteria and methods for evaluating the performance of Teak Ltd, as well as documented information of the results of such evaluation. ABC Ltd should also have defined the supply arrangements with Teak Ltd, including the specifications, requirements, and verification activities related to the products and services provided by Teak Ltd.

Hence, the best options to describe how to plan the audit of the interrelationship with Teak Ltd during the Stage 2 audit at ABC Ltd are A and D, as they are aligned with the requirements of ISO 9001:2015, clause 8.4. The other options are either irrelevant or beyond the scope of the audit, as they do not pertain to the control of external provision by ABC Ltd.

Comprehensive and Detailed In-Depth Explanation:

According to ISO 17021-1:2015, Clause 9.4.10 (Corrective Actions for Major Nonconformities):

If a major nonconformity is not corrected within six months, the certification body must reject the certification request.

Another Stage 2 audit (C) is not required unless the organization reapplies for certification.

Restarting all audit activities (B) is unnecessary; instead, certification is denied.

Thus, A is the correct answer.

Comprehensive and Detailed In-Depth Explanation:

During communication with top management, the auditor should discuss:

The quality policy (ISO 9001:2015, Clause 5.2.1), ensuring that it is established, communicated, and understood.

Internal audits (ISO 9001:2015, Clause 9.2), verifying that they are planned and effectively implemented.

These discussions help assess leadership commitment and the effectiveness of the QMS.