An off-specification is a type of issue that occurs when something that should be provided by the project is either not delivered or does not meet the required specifications. This could involve a missing product or a product that fails to conform to the agreed-upon quality standards.

A request for change is a type of issue. In project management, specifically within the PRINCE2 methodology, an issue is considered to be either a request for change, an off-specification, or a problem/concern. A request for change involves proposing a modification to a baseline and is classified as an issue that needs to be managed.

A typical core activity within configuration management is verification and audit. This activity ensures that the configuration items are correct and that any changes have been implemented accurately, which is a crucial aspect of maintaining the integrity and consistency of the configuration throughout the product lifecycle.

Identification is a typical core activity within configuration management. Configuration management involves the process of identifying and defining the items in the system, controlling the changes of these items throughout their lifecycle, and verifying that they are complete and accurate. Identification is the first step in ensuring that each configuration item is uniquely labeled and tracked properly.

A configuration management system is essential for ensuring effective issue and change control. It allows the organization to manage and track all changes systematically, ensuring that all modifications are documented, authorized, and implemented correctly. This system helps maintain the integrity and consistency of the products throughout their lifecycle, ensuring that the correct versions are delivered and the project baselines are accurately maintained.