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As industry becomes more disciplined in system engineering, a hallmark of maturity and control is the ability to measure processes. Recent focus on process improvements have included models and metrics. This paper presents a process flow model that is suitable for communicating process descriptions to a wide audience and which can serve as a platform for metrics for both processes and products.Large, complex, distributed command and control systems have been analyzed with a number of coordinated paradigms, including the model described in this paper. Structured Process Flows (SPFs), which were developed at Hughes Aircraft, give an integrated overview of systems complementary to partitioned structured analysis models. It is a leveled, end‐to‐end threaded view of the major processes in a system and provides the necessary first view of the system, while enabling decomposition for details. SPFs are examined as a platform for understanding processes, for exploration of metrics, and as a mechanism for collecting measurements.

This paper presents an overview of the real time system/software methodology approach being deployed within Hughes Aircraft Company. The Hatley‐Pirbhai Process for System Development (PSD) was chosen as the training standard for all systems and software engineers in a common engineering method to increase productivity, quality of design, and communications between various engineering disciplines. The approach that Hughes has taken is to adopt a well defined and proven methodology available from industry and to customize it to include specific extensions applicable to the types of systems developed by Hughes Aircraft product organizations. Two such extensions, information modeling and requirements traceability tooling, are discussed in this paper. In conclusion, the paper will discuss the lessons learned for using the integrated system development methodology and follow‐on activities that are being worked on today.