Explanation
The statement describes the organizational boundaries of the ISMS scope, which define which parts of the organization are included or excluded from the ISMS. The organizational boundaries can be based on criteria such as departments, functions, processes, activities, or locations. In this case, the statement specifies that the ISMS covers all departments within Company XYZ that have access to customers' data, and excludes the ones that do not. The statement also explains the purpose of the ISMS, which is to ensure the confidentiality, integrity, and availability of customers' data, and ensure compliance with the applicable regulatory requirements regarding information security.
The statement does not describe the information systems boundary of the ISMS scope, which defines which information systems are included or excluded from the ISMS. The information systems boundary can be based on criteria such as hardware, software, networks, databases, or applications. The statement does not mention any specific information systems that are covered by the ISMS.
The statement also does not describe the physical boundary of the ISMS scope, which defines which physical locations are included or excluded from the ISMS. The physical boundary can be based on criteria such as buildings, rooms, cabinets, or devices. The statement does not mention any specific physical locations that are covered by the ISMS.
References:
ISO/IEC 27001:2013, clause 4.3: Determining the scope of the information security management system ISO/IEC 27001 Lead Implementer Course, Module 4: Planning the ISMS based on ISO/IEC 27001 ISO/IEC 27001 Lead Implementer Course, Module 6: Implementing the ISMS based on ISO/IEC 27001 ISO/IEC 27001 Lead Implementer Course, Module 7: Performance evaluation, monitoring and measurement of the ISMS based on ISO/IEC 27001 ISO/IEC 27001 Lead Implementer Course, Module 8: Continual improvement of the ISMS based on ISO/IEC 27001 ISO/IEC 27001 Lead Implementer Course, Module 9: Preparing for the ISMS certification audit ISO/IEC 27001 scope statement | How to set the scope of your ISMS - Advisera1 How to Write an ISO 27001 Scope Statement (+3 Examples) - Compleye2 How To Use an Information Flow Map to Determine Scope of Your ISMS3 ISMS SCOPE DOCUMENT - Resolver4 Define the Scope and Objectives - ISMS Info5

According to the ISO/IEC 27001 : 2022 Lead Implementer course, one of the roles and responsibilities of an internal auditor is to provide recommendations for improvement based on the audit findings1. Therefore, Tessa can create a plan for ISMS monitoring and measurement and present it to the top management as a way of advising them on how to improve the company's functions. However, Tessa is not responsible for implementing the improvements or communicating the issues found to the top management. Those tasks belong to the process owners and the management representative, respectively2.
References: 1: PECB, ISO/IEC 27001 Lead Implementer Course, Module 9: Internal Audit, slide 14 2: PECB, ISO/IEC 27001 Lead Implementer Course, Module 9: Internal Audit, slide 15

Explanation
According to ISO/IEC 27001:2013, clause 9.1, an organization must monitor, measure, analyze and evaluate its information security performance and effectiveness. This includes determining what needs to be monitored and measured, the methods for doing so, when and by whom the monitoring and measurement shall be performed, when the results shall be analyzed and evaluated, and who shall be responsible for ensuring that the actions arising from the analysis and evaluation are taken 1.
SunDee failed to comply with this requirement and did not monitor or measure the performance and effectiveness of its ISMS for the past two years. As a result, the company did not have any objective evidence or indicators to demonstrate the achievement of its information security objectives, the effectiveness of its controls, the satisfaction of its interested parties, or the identification and treatment of its risks. This also meant that the company did not conduct regular management reviews of its ISMS, as required by clause 9.3, which would provide an opportunity for the top management to ensure the continuing suitability, adequacy and effectiveness of the ISMS, and to decide on any changes or improvements needed 1.
Just before the recertification audit, the company decided to conduct an internal audit, as required by clause
9.2, which is a systematic, independent and documented process for obtaining audit evidence and evaluating it objectively to determine the extent to which the audit criteria are fulfilled 1. However, the company did not have a well-defined audit program, scope, criteria, or methodology, and relied on the written reports of its staff for the past two years. This caused a disruption in the workforce, as most of the staff had to compile their reports for their departments, leaving the Production Department with less than the optimum workforce, which decreased the company's stock. Moreover, the internal audit process was very inconsistent, as the reports were written by different employees with different styles, formats, and levels of detail. The internal audit process also lacked any qualitative measures, such as performance indicators, metrics, or benchmarks, to evaluate the performance and effectiveness of the ISMS.
Therefore, the cause of SunDee's workforce disruption was the negligence of performance evaluation and monitoring and measurement procedures, which led to a lack of objective evidence, a poorly planned and executed internal audit, and a decrease in the company's productivity and stock value.
References: 1: ISO/IEC 27001:2013, Information technology - Security techniques - Information security management systems - Requirements