The purpose of a test plan is to?

A test plan serves as a comprehensive document that outlines the scope, approach, resources, and schedule of testing activities for a particular project. It is a crucial part of the testing process as it establishes the foundation for what will be tested, how it will be tested, and who will be involved. This planning phase addresses important aspects such as the objectives of the testing, the specific testing methods to be employed, criteria for test success, and the resources required, thereby providing a strategic framework for the testing effort.

The other options do not align with the primary purpose of a test plan. Detailing code implementation pertains more to development and coding practices rather than the testing strategy. Providing user documentation relates to end-user guidance and support, which comes into play after testing is completed. Conducting user acceptance testing refers specifically to the phase where end-users verify if the system meets their requirements but is just one aspect of the overall testing process. Thus, the outline of testing scope and approach captured in the test plan encompasses all necessary elements to guide and frame the testing activities effectively.