Incident: Spirit Airlines Computer Outage Causes Delayed Departures of 16 Flights

Published Date: 2018-03-09

Postmortem Analysis
Timeline 1. The software failure incident happened on March 9, 2018. [69144]
System The software failure incident reported in Article #69144 involved a computer outage at Spirit Airlines. The specific system that failed was the airline's computer system.
Responsible Organization 1. Spirit Airlines Inc - The software failure incident was caused by a computer outage experienced by Spirit Airlines Inc [69144].
Impacted Organization 1. Spirit Airlines Inc [69144]
Software Causes 1. The software causes of the failure incident were not explicitly mentioned in the article [69144].
Non-software Causes 1. The computer outage at Spirit Airlines was caused by a brief system outage that lasted an hour [69144].
Impacts 1. Delayed departures of 16 flights were caused by the computer outage at Spirit Airlines [69144].
Preventions 1. Implementing robust backup systems and redundancy measures to ensure continuity of operations in case of a system outage [69144]. 2. Conducting regular system maintenance and updates to prevent potential software glitches or failures [69144]. 3. Performing thorough testing and quality assurance checks before deploying any system changes or updates to avoid introducing new issues that could lead to outages [69144].
Fixes 1. Conducting a thorough investigation to determine the root cause of the computer outage [69144]. 2. Implementing measures to prevent similar system outages in the future, such as enhancing system redundancy or implementing failover mechanisms [69144].
References 1. Spirit Airlines spokesman Derek Dombrowski [69144] 2. U.S. Federal Aviation Administration [69144]

Software Taxonomy of Faults

Category Option Rationale
Recurring unknown (a) The article does not mention any previous incidents of software failure within Spirit Airlines. Therefore, there is no information provided about a similar incident happening again within the same organization [69144]. (b) The article does not mention any similar incidents happening at other organizations or with their products and services. Therefore, there is no information provided about a similar incident happening again at multiple organizations [69144].
Phase (Design/Operation) design (a) The software failure incident at Spirit Airlines was related to the design phase. The article mentions that the computer outage was caused by a brief system outage, indicating a problem with the system design or updates. The airline was investigating the cause of the problem, suggesting that it may have been related to factors introduced during system development or updates [69144].
Boundary (Internal/External) within_system (a) The software failure incident reported in Article 69144 was within_system. The article mentions that Spirit Airlines Inc suffered a computer outage that directly impacted 16 flights. The spokesman for the airline stated that they experienced a brief system outage, indicating that the failure originated from within the system itself [69144].
Nature (Human/Non-human) non-human_actions (a) The software failure incident at Spirit Airlines was attributed to a computer outage that lasted an hour, causing delayed departures of 16 flights. The outage was described as a brief system outage that directly impacted the flights. The airline was investigating the cause of the problem, indicating that the failure was due to non-human actions, likely a technical issue within the system itself [69144].
Dimension (Hardware/Software) hardware (a) The software failure incident reported in Article 69144 was due to contributing factors originating in hardware. The article mentions that Spirit Airlines Inc suffered a computer outage that caused delayed departures of 16 flights. The outage was described as a brief system outage, indicating that the issue was related to the hardware system rather than the software itself. The company was investigating the cause of the problem, suggesting a hardware-related issue [69144].
Objective (Malicious/Non-malicious) non-malicious (a) The software failure incident reported in Article 69144 was non-malicious. The article mentions that Spirit Airlines Inc suffered a computer outage that lasted an hour, causing delayed departures of 16 flights. The spokesman for the airline stated that they experienced a brief system outage, and the issue was resolved. The company was investigating the cause of the problem, indicating that it was not a deliberate act to harm the system [69144].
Intent (Poor/Accidental Decisions) unknown (a) The software failure incident at Spirit Airlines was not explicitly attributed to poor decisions. The article mentions that the outage was brief, lasting an hour, and directly impacted 16 flights. The company was investigating the cause of the problem, indicating a focus on identifying the technical root cause rather than poor decision-making [69144]. (b) The software failure incident at Spirit Airlines was described as a computer outage that caused delayed departures of 16 flights. The outage was characterized as brief and resolved within an hour. The article does not provide specific details suggesting that the incident was caused by accidental decisions or mistakes [69144].
Capability (Incompetence/Accidental) accidental (a) The software failure incident reported in Article 69144 was not explicitly attributed to development incompetence. The article mentioned that Spirit Airlines Inc suffered a computer outage that lasted an hour, causing delayed departures of 16 flights. The spokesman for the airline mentioned that they were investigating the cause of the problem, indicating that the root cause was not immediately clear [69144]. (b) The software failure incident in Article 69144 was described as a computer outage that lasted an hour and directly impacted 16 flights. The outage was characterized as a brief system outage, and the airline spokesman mentioned that the issue was now resolved. This description suggests that the failure was more likely accidental rather than a result of development incompetence [69144].
Duration temporary (a) The software failure incident in the article was temporary. The article mentions that Spirit Airlines Inc suffered a computer outage that lasted an hour, causing delayed departures of 16 flights. The spokesman for the airline mentioned that the issue was resolved after the hour-long outage, indicating that it was not a permanent failure [69144].
Behaviour crash, other (a) crash: The software failure incident in the article can be categorized as a crash. The article mentions that Spirit Airlines Inc suffered a computer outage that directly impacted 16 flights, leading to delayed departures. The outage lasted for an hour, during which the system was not performing its intended functions, resulting in flight delays [69144]. (b) omission: There is no specific mention in the article indicating that the software failure incident was due to the system omitting to perform its intended functions at an instance(s). (c) timing: The software failure incident is not described as a timing issue where the system performed its intended functions correctly but too late or too early. (d) value: The software failure incident is not attributed to the system performing its intended functions incorrectly. (e) byzantine: The software failure incident is not described as a byzantine failure where the system behaves erroneously with inconsistent responses and interactions. (f) other: The behavior of the software failure incident in the article can be categorized as a system outage that directly impacted flight operations, leading to delayed departures. The system failure disrupted the normal functioning of the airline's operations, requiring investigation into the cause of the problem [69144].

IoT System Layer

Layer Option Rationale
Perception None None
Communication None None
Application None None

Other Details

Category Option Rationale
Consequence delay The consequence of the software failure incident reported in Article #69144 was a delay. The computer outage at Spirit Airlines caused delayed departures of 16 flights [69144].
Domain transportation (a) The failed system was intended to support the transportation industry. The software failure incident affected Spirit Airlines, a U.S. budget airline, causing delayed departures of 16 flights [Article 69144].

Sources

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