Which aspect is a concern under underwriting issues in functional requirements?

In the context of underwriting issues within functional requirements, focusing on business rules is particularly relevant because these rules are foundational to the underwriting process. They define the criteria and guidelines that underwriters use to assess risks and make decisions about policy acceptance, pricing, and terms of coverage.

Business rules govern how information is evaluated and processed, ensuring consistency and compliance with regulatory standards. This aspect is crucial as it encapsulates the operational principles that an underwriting system must adhere to when determining insurability and setting premiums. The integrity and effectiveness of these business rules directly impact the underwriting workflow and decisions.

While customer loyalty, marketing initiatives, and external market trends are important business considerations, they do not fall under the core functional requirements for underwriting issues. These aspects may inform underwriting strategies and market positioning but are not directly related to the mechanics of risk assessment, which is primarily dictated by the established business rules within the underwriting framework.