DO-178C vs. DO-254

Attribute	DO-178C	DO-254
Scope	Software	Hardware
Primary Focus	Software development	Hardware development
Applicability	Avionics software	Avionics hardware
Compliance Level	Level A-E	Level A-D
Development Process	Software life cycle processes	Hardware life cycle processes

Introduction

DO-178C and DO-254 are two important standards in the aerospace industry that govern the development of software and hardware for airborne systems. While they have different focuses - DO-178C on software and DO-254 on hardware - they share many similarities in terms of their objectives and processes. In this article, we will compare the attributes of DO-178C and DO-254 to highlight their differences and similarities.

Scope

DO-178C, also known as Software Considerations in Airborne Systems and Equipment Certification, is a standard developed by RTCA, Inc. that provides guidelines for the certification of software used in airborne systems. It applies to all software that is part of airborne systems, including operating systems, application software, and firmware. On the other hand, DO-254, also known as Design Assurance Guidance for Airborne Electronic Hardware, focuses on the development of electronic hardware used in airborne systems, such as integrated circuits, printed circuit boards, and electronic components.

Objectives

The main objective of DO-178C is to ensure the safety and reliability of airborne software by providing a set of guidelines and processes for its development, verification, and certification. It aims to minimize the risk of software-related failures that could lead to catastrophic events. Similarly, the main objective of DO-254 is to ensure the safety and reliability of airborne electronic hardware by providing guidance on the development, verification, and validation of hardware components. Both standards aim to achieve compliance with regulatory requirements and industry best practices.

Development Process

DO-178C defines a software development process that consists of several key activities, including requirements analysis, design, implementation, verification, and validation. It also requires the use of specific tools and techniques, such as traceability analysis, code reviews, and testing. Similarly, DO-254 defines a hardware development process that includes activities such as requirements capture, design, implementation, verification, and validation. It also mandates the use of tools and techniques, such as simulation, modeling, and testing.

Verification and Validation

Both DO-178C and DO-254 emphasize the importance of verification and validation in ensuring the safety and reliability of airborne systems. DO-178C requires the use of various verification methods, such as static analysis, dynamic analysis, and testing, to demonstrate that the software meets its requirements. Similarly, DO-254 requires the use of verification methods, such as simulation, modeling, and testing, to demonstrate that the hardware meets its requirements. Both standards also require the use of independent verification and validation processes to ensure objectivity and thoroughness.

Certification

One of the key similarities between DO-178C and DO-254 is their focus on certification. Both standards require the development of certification plans that outline the processes and activities necessary to demonstrate compliance with the standard. They also require the submission of certification artifacts, such as requirements documents, design documents, test plans, and test results, to the certification authority for review and approval. Certification is a critical step in the development of airborne systems, as it demonstrates that the software and hardware meet the necessary safety and reliability requirements.

Conclusion

In conclusion, DO-178C and DO-254 are two important standards in the aerospace industry that govern the development of software and hardware for airborne systems. While they have different focuses - software for DO-178C and hardware for DO-254 - they share many similarities in terms of their objectives, processes, and requirements. Both standards aim to ensure the safety and reliability of airborne systems by providing guidelines for the development, verification, and certification of software and hardware components. By following these standards, aerospace companies can demonstrate compliance with regulatory requirements and industry best practices, ultimately leading to safer and more reliable airborne systems.