Requirements Verification

The final step of the systems engineering process is to demonstrate compliance with project requirements through verification activities, ultimately meeting all mission requirements. We demonstrate compliance with mission requirements through Roll-Up, or the philosophy of showing compliance to the parent by demonstrating compliance with all children requirements. To accomplish Roll-Up verification, the Iris team creates verification activities as children of subsystem requirements through one of four verification methods:

• Review of Design/Documentation: Determines conformance to requirements by examination of technical drawings, CAD models, or design documentations (such as component specifications or qualification reports).

• Analysis: Evaluation of data by generally accepted analytical techniques to determine that the item will meet specified requirements. Techniques include calculations and simulations.

• Inspection: Determines conformance to requirements by the visual examination of the design item using standard quality control methods, without the use of special laboratory procedures or equipment. Activities include measurements (dimensions and mass) and visual inspections of features.

• Test: A verification method in which technical means, such as the use of special equipment, instrumentation, simulation techniques, or the application of established principles and procedures are used for the evaluation of the system or system components to determine compliance with requirements.

Verification activities are undertaken throughout the project, with review and analysis being the primary verification activities during phases B and C. Phase D, also known as the Assembly, Integration, and Test (AIT), has the majority of the test and inspection activities, to demonstrate a functioning final product before launch.

[1] CCP AIT Webinar Part 1