Using Prototypes, Verification, and Validation to Evaluate and Enhance System Architecture

Abstract

The MBSAP methodology is tied together by a prototyping environment that allows an evolving system architecture to be exercised and assessed for purposes as diverse as verification and validation (V&V), performance analysis, trade study quantification, and human-in-the-loop experimentation. It has two complementary dimensions: a physical prototype is built up from real or emulated system components, while a virtual prototype brings together a set of system simulations. The virtual prototyping strategy mirrors the levels of the Axis of Abstraction of the architecture taxonomy in Chap. 1. First, we establish the fundamental concepts and terminology and explore the details of physical and virtual prototypes. We then present the essentials of V&V and the role of prototyping and simulation, and we discuss additional uses of prototyping to support a system development effort. We briefly summarize an alternative approach to SysML using Petri nets. Finally, we use the Smart Microgrid and E-X examples to illustrate these prototyping concepts. The essential idea is that a properly planned and executed prototyping activity can be of great value in reducing risk, saving cost and schedule, enhancing system V&V, and supporting many other aspects of the system life cycle. Chapter Objective: the reader will be able to define an effective prototyping strategy, including virtual and physical prototypes, and to incorporate prototypes in the planning, execution, and assessment of a system development program.