Table of Contents

2.6.5 Step 4: failure effects

Failure effects detail what happens if nothing is done to predict or prevent a failure mode. Failure effects should be written with enough detail to appropriately assess the consequences at the time a failure occurs. One failure effect is written for each identified failure mode.

These descriptions should include all the information needed to support the evaluation of the consequences of the failure, such as:

  • description of the failure process from the occurrence of the failure mode to the functional failure
  • physical evidence or signs that a failure has occurred
  • how the failure poses a threat to safety or the environment
  • how the failure affects operation or road network efficiency
  • operational limitations/restrictions as a result of the failure mode
  • secondary damage
  • cost and time to repair the failure.