Product description

In the PRINCE2 project management method, a product description (PDD) is a structured format that presents information about a project product.

[1] It should not be confused with a project product description(PPD), which (in the PRINCE2 method) is generated in the start up process of the pre-project stage, and forms part of the Project Brief.

However, the project may require simulations, and even a wind-tunnel prototype and testing rig.

Those are intermediate products, not handed or delivered to the client.

However they are still subject to definitions and quality criteria that is detailed in the corresponding PDDs.