The domain model represents the knowledge for the planning of a project, for the definition of requirements and the construction of the logical model of a solution, in the field of software or in any other. The development of products lines requires to dispose earlier more complete domain knowledge than that for the development of individual software products. Indeed, it is necessary to consider just at the beginning the domain variability and components reuse in an ample family of products, as well as, the initial investments for this change of development paradigm. The three project risk categories more recognized in the PERIL data base (Project Experienced Risks Information Library): Scope, schedule and resources are aspects whose management in the products lines approach require more rapid and comprehensive treatment of the domain knowledge. In order to attend this high exigency and risks in managing of domain knowledge, this research proposes a defect-based risks model combined with a set of generic radical and moderate solutions, applicable to any project phase or to the whole project. The proposed solution covers from risks identification to the formulation of preventive, corrective and mitigation controls. The not consideration of some load cases in a structural analysis in a civil engineering project illustrates the application these different types of controls.