RASSP Definition and Role of Executable Requirement (ER-SPEC) and Design (ED-SPEC) Specifications Application Note

4.1 Conclusions

• Executable requirements add value to a RASSP project by providing quantitative, unambiguous statements of requirements which are independent of implementation.
• Executable specifications describe equipment specific solutions to a requirements statement and can be used to demonstrate conformance to requirements during the virtual prototyping phase of a project.
• The RASSP methodology is designed to manage a project over its complete life cycle, including model year upgrades. The ER-spec provides a detailed record of original requirements which can be modified as needed to adapt to a system update. Effects of modification of original requirements at any system packaging level can be readily evaluated by creating an updated ED-spec to match the updated ER-spec.
• Use of ER-specs and ED-specs will add to the quality of designs and produce products with a high probability of first pass success by reducing ambiguity and its associated probability of error.
• A hierarchical ER-spec/ED-spec system will facilitate correct requirements flow down through levels of packaging and monitoring of conformance throughout the life cycle of a project.
• Use of executable requirements and design specifications is very likely to result in economic savings for a project over its life cycle similiar to those expected to be achieved using the automation in the RASSP methodology