Quality is a vital dimension of project management. If a project focuses on money and cost, but ignores quality the resultant product may be substandard or non-functional.
PRINCE2 does not ask for the highest quality in every project, but attempts to help deliver quality that is appropriate for the particular project and help to deliver at that level.
Because the initial outline of the project is viewed as a broad outline, this theme explains how this outline is developed in a way that all participants understand the quality attributes required to be delivered. It also describes how project management will ensure these requirements are delivered