Abstract: A method for generating a computer model representing constraints and desired functions for generating a product or service includes receiving user-selected items including requirements, features, dangers, goals, processes, stakeholders, or objects that are defined by a predetermined meta-model. A data element for each of the selected items received from the user is added to the computer model. A relationship is defined between the data element of the data elements and the defined relationships between the data elements are added to the computer model. The meta-model defines relationships between requirements and features, requirements and dangers, and requirements and goals. A graphical notation library defines a unique descriptive icon for each class of the selected items received from the user.