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The aircraft manufacturers are constantly driving to reduce manufacturing lead times and cost at the same time as the product complexity increases and technology continues to change. As avionics systems have evolved, particularly over the past two or three decades, the level of functional integration has increased dramatically.This paper describes a study that assessed the feasibility of developing an ARINC 653 based operational flight program (OFP) prototype and will provide valuable lessons learned through OFP development. The OFP architecture consists of two distinct modules: a core that interfaces and monitors the hardware and provides a standard and common environment for software applications; and an application module that performs the avionics functions. The prototype OFP is being integrated with the FA-50 simulator at the avionics laboratory of Korea Aerospace Industries.

Component-based analysis allows a robust time and space decomposition of a complex real-time system into components, which are then recomposed and hierarchically scheduled under potentially different scheduling policies. This mechanism is of great benefit to many critical systems as it enables fault isolation. To provide fault-tolerant scheduling in a compositional real-time scheduling framework, a few works have recently emerged, but remain inefficient in providing fault isolation or in terms of resource utilization. In this paper, we introduced a new interface model that takes into account the fault requirements of a component, and a fault-tolerant resource model that helps the component to effectively respond to each of its child components in presence of a fault. Finally, we analyzed the schedulability of the framework considering the Rate Monotonic scheduling algorithm.

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