You are Test Manager of a project delivering a workflow system for complex business processes It has been decided a tool is required to increase the efficiency of test execution. What would be a valid issue to consider when deciding whether to build a custom made tool? SELECT ONE OPTION

When developing custom-built (in-house) test tools, a significant risk is the dependency on the tool's creator. If the tool is not adequately documented and the creator leaves the organization or transitions to another role, the tool may become unmaintainable and unusable. The ISTQB Advanced Level Test Manager syllabus highlights this "key person dependency" and lack of documentation as primary issues to consider when deciding whether to build a custom tool versus acquiring a commercial off-the-shelf (COTS) or open-source tool.

A. Custom tools can be designed for long-term use across multiple projects; being limited to a single project is a scope choice, not an inherent flaw of custom tools.
C. Custom tools are often built specifically to integrate seamlessly with an organization's existing toolchain, which is an advantage, not a typical issue.
D. Custom tools are explicitly designed to meet the specific requirements of the project, making this statement contradictory to the nature of custom development.

- ISTQB Certified Tester Advanced Level Syllabus - Test Manager (v2012), Section 6.2.2 "Open-Source Tools, Custom Tools, and Return on Investment", p. 58.

- "Software Testing Foundations: A Study Guide for the Certified Tester Exam" by Andreas Spillner et al., Chapter on Test Tools.