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Measuring response times and more with RapiTime
Why mitigating interference alone isn’t enough to verify timing performance for multicore DO-178C projects
There are how many sources of interference in a multicore system?
Supporting modern development methodologies for verification of safety-critical software
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2023-10-01
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2023-10-24
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Developing DO-178C and ED-12C-certifiable multicore software
DO178C Handbook
Efficient Verification Through the DO-178C Life Cycle
A Commercial Solution for Safety-Critical Multicore Timing Analysis
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Streamlined software verification with RVS 3.19
Challenges of certifying multicore avionics in line with A(M)C 20-193 objectives - ATW Europe 2023
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Supporting ISO 26262 ASIL D software verification for EasyMile
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What is Aerospace Software Testing?

From the fasten seatbelt sign to the flight control unit, software can be found almost everywhere in avionics systems.

To ensure the safety of passengers, crew, and the aircraft, aerospace software applications must be vigorously tested within strict guidelines to ensure that they operate correctly. Failure of onboard critical software (safety-critical and/or mission critical) could have far-reaching repercussions.

Avionics systems often comprise many thousands of functions and millions of lines of code. To ensure safety of the system, these must be tested to make sure that they operate as expected. Activities used to test avionics systems include:

  • Functional testing to ensure that the software meets high- and low-level requirements.
  • Worst-case execution time analysis to ensure that time-critical sections of code meet timing deadlines
  • Structural coverage analysis to ensure that structural elements of the code (such as statements) have been tested to an acceptable degree

 

Aerospace software testing 

Aerospace software testing solutions

  • Unit/system testing
  • Code coverage analysis
  • Timing analysis
  • Schedule/event tracing

What is DO-178?

When approving commercial software-based aerospace systems, certification authorities such as the EASA and FAA refer to the DO-178C Software Considerations in Airborne Systems and Equipment Certification guideline, which ensures that safety-critical software used in airborne systems is safe to use.

According to AC 20-115, DO-178C is recognized as an "acceptable means, but not the only means, for showing compliance with the applicable airworthiness regulations for the software aspects of airborne systems and equipment certification."

This guideline superseded its predecessor, DO-178B, in 2012.

DO-178-whitepapers
 

What are software levels?

A system’s Design Assurance Level (DAL) (also known as Item Development Assurance Level or IDAL) derives from hazard analysis and the safety assessment process. Software is categorized into a DAL based on the impact of a failure condition in the system on the passengers, crew, and aircraft.

Level

Failure condition

A

Catastrophic

B

Hazardous

C

Major

D

Minor

E

No safety effects

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