Fault injection testing is a technique used in the context of functional safety and is based on the ISO 26262 standard. The purpose of fault injection testing is to simulate faults or errors that could occur in the system being tested and evaluate the system's ability to detect and react to those faults.
In ISO 26262, fault injection testing is part of the verification and validation process for safety-critical systems.
These are guidelines for how to perform fault injection testing, including the following steps:
- Define the objectives of the test, including the types of faults to be injected, the timing of the faults, and the expected results.
- Identify the faults to be injected, based on an analysis of the system's failure modes and effects.
- Develop a fault injection strategy, which may involve injecting faults at various points in the system, or simulating multiple faults simultaneously.
- Implement the fault injection strategy using a combination of hardware and software tools.
- Execute the fault injection tests, and record the results, including any failures or anomalies observed.
- Analyze the results of the fault injection tests to determine the effectiveness of the system's fault detection and fault handling mechanisms.
- Use the results of the fault injection tests to improve the design and implementation of the system, and to ensure that it meets the safety requirements specified in ISO 26262.
Overall, fault injection testing is an important tool for verifying the safety and reliability of safety-critical systems, and is a key component of the ISO 26262 standard..
