Incident: Sky Glass TV Software Update to Address Screen Flickering.

Published Date: 2021-11-02

Postmortem Analysis
Timeline 1. The software failure incident with Sky Glass customers experiencing screen flickering, out-of-sync sound, and video lag happened less than a month after the launch of the broadcaster's new streaming television [Article 120789]. Estimation: Step 1: The incident occurred less than a month after the launch of the new streaming television. Step 2: The article was published on 2021-11-02. Step 3: Estimation: The incident likely occurred in October 2021.
System The software failure incident reported in Article 120789 involved the Sky Glass TV system. The specific components or models that failed in this incident are: 1. Sky Glass TV system 2. Sky Stream puck device These components experienced issues such as screen flickering, out-of-sync sound, video lag, flashing squares on the screen, sound problems, patchy pictures, and dropping out of the streaming device. The failure led to customer complaints and frustration, prompting Sky to release a software update to address the reported problems. [120789]
Responsible Organization 1. Sky - The software failure incident with Sky Glass TVs, including screen flickering, out-of-sync sound, video lag, flashing squares on the screen, and patchy pictures when using the streaming device, was caused by issues related to the software embedded in the TVs and the streaming technology [Article 120789].
Impacted Organization 1. Sky Glass customers [Article 120789]
Software Causes 1. Screen flickering, out-of-sync sound, video lag, flashing square on the screen, sound problems, patchy pictures when using the 'puck' device - These issues were reported by customers of Sky Glass TV [Article 120789].
Non-software Causes 1. Hardware issues such as screen flickering, out-of-sync sound, and video lag reported by customers [Article 120789]. 2. Problems with the streaming device (puck) dropping out, speeding up and down, and needing restarts [Article 120789]. 3. White flickering lines appearing across the screen [Article 120789]. 4. Patchy pictures when using the streaming device to stream content to TVs in other rooms [Article 120789].
Impacts 1. Customers experienced screen flickering, out-of-sync sound, video lag, flashing squares on the screen, sound problems, patchy pictures when using the streaming device, and white flickering lines across the screen [Article 120789].
Preventions 1. Thorough testing and quality assurance processes before the launch of the Sky Glass TV could have helped identify and address potential software issues [120789]. 2. Implementing a more robust software update process to ensure timely fixes for reported problems could have prevented customer dissatisfaction and negative feedback [120789]. 3. Conducting beta testing with a diverse group of users to gather feedback on potential software issues before the official release could have helped in identifying and resolving issues proactively [unknown].
Fixes 1. A software update scheduled by Sky to address the reported issues [Article 120789].
References 1. Sky Glass customers on Sky's community forum [Article 120789] 2. Sky spokesman [Article 120789]

Software Taxonomy of Faults

Category Option Rationale
Recurring unknown <Article 120789> does not provide information about a similar software failure incident happening again at the same organization or at multiple organizations. Therefore, the information for both options is 'unknown'.
Phase (Design/Operation) design, operation (a) The software failure incident related to the design phase can be seen in the article where Sky Glass customers have complained about various issues such as screen flickering, out-of-sync sound, video lag, flashing squares on the screen, sound problems, and patchy pictures when using the streaming device [Article 120789]. These issues indicate that there were contributing factors introduced during the system development or updates that led to these problems. (b) The software failure incident related to the operation phase is evident from customers reporting problems like the picture freezing, flickering white lines on the screen, pucks constantly dropping out, speeding up and down, needing restarts, and other operational issues with the Sky Glass TV [Article 120789]. These issues suggest that there were contributing factors introduced during the operation or misuse of the system that resulted in these failures.
Boundary (Internal/External) within_system (a) within_system: The software failure incident reported in the article is related to issues within the Sky Glass TV system itself. Customers have complained about screen flickering, out-of-sync sound, video lag, flashing squares on the screen, sound problems, patchy pictures when using the streaming device, and white flickering lines across the screen [Article 120789]. These issues indicate that the failure originated from within the Sky Glass TV system and its software. (b) outside_system: There is no information in the article suggesting that the software failure incident was caused by contributing factors originating from outside the Sky Glass TV system.
Nature (Human/Non-human) non-human_actions, human_actions (a) The software failure incident in the Sky Glass TV reported in Article 120789 seems to be primarily related to non-human actions. Customers have complained about issues such as screen flickering, out-of-sync sound, video lag, flashing squares on the screen, and patchy pictures when using the streaming device. Sky is set to release a software update to address these problems, indicating that the issues are likely due to software bugs or glitches introduced during the development or deployment of the product [120789]. (b) While the software failure incident in the Sky Glass TV appears to be mainly attributed to non-human actions like software bugs, there is also a human element involved. Some customers have reported problems with the streaming device dropping out, speeding up and down, needing restarts, despite settings being disabled. This could potentially be related to how customers are interacting with the device or the setup process, which may contribute to the reported issues [120789].
Dimension (Hardware/Software) hardware, software (a) The software failure incident occurring due to hardware: - The article mentions that some Sky Glass customers have reported issues such as screen flickering, out-of-sync sound, video lag, flashing square on the screen, and patchy pictures when using the 'puck' device that streams Glass to TVs in another room [Article 120789]. - These hardware-related issues could be contributing to the software failure incident experienced by customers. (b) The software failure incident occurring due to software: - Sky has acknowledged that a very small number of customers have reported flickering issues and they have scheduled a software update to resolve this problem [Article 120789]. - The need for a software update to address the reported issues indicates that the software itself may have bugs or faults contributing to the failure incident.
Objective (Malicious/Non-malicious) non-malicious (a) The software failure incident reported in the article is non-malicious. Customers of Sky Glass have experienced issues such as screen flickering, out-of-sync sound, video lag, flashing squares on the screen, sound problems, patchy pictures, and white flickering lines across the screen [Article 120789]. These issues are likely due to software bugs or glitches introduced during the development or deployment of the new streaming television. Sky has acknowledged the problems and is planning to release a software update to address the reported issues, indicating a non-malicious intent to resolve the software failures.
Intent (Poor/Accidental Decisions) poor_decisions (a) The intent of the software failure incident: The software failure incident related to Sky Glass customers experiencing screen flickering, out-of-sync sound, video lag, flashing squares on the screen, sound problems, patchy pictures, and issues with the streaming device called the 'puck' [Article 120789]. These issues were likely due to poor decisions in the software development process, such as inadequate testing, rushed releases, or insufficient quality control measures. The fact that Sky is set to release a software update to address the problems indicates that there were issues in the initial software implementation that led to customer dissatisfaction.
Capability (Incompetence/Accidental) development_incompetence, accidental (a) The software failure incident related to the Sky Glass TV issues, such as screen flickering, out-of-sync sound, video lag, flashing square on the screen, sound problems, patchy pictures, and puck devices dropping out, can be attributed to development incompetence. Customers reported various technical issues with the new streaming television just weeks after its launch, indicating that there were issues in the development and testing phase that led to these problems [Article 120789]. (b) The software failure incident can also be considered accidental as it seems that the issues faced by customers were not intentional but rather unintended consequences of the software implementation. The article mentions that a software update is scheduled to address the problems, indicating that the issues were not deliberate but accidental outcomes of the software design and deployment [Article 120789].
Duration temporary The software failure incident reported in the article is temporary. Customers of Sky Glass have complained about various issues such as screen flickering, out-of-sync sound, video lag, flashing squares on the screen, sound problems, patchy pictures when using the streaming device, and white flickering lines across the screen. Sky has acknowledged these issues and is set to release a software update to address the problems [Article 120789].
Behaviour value, other (a) crash: The software failure incident reported in the article is not specifically described as a crash where the system loses state and does not perform any of its intended functions. Instead, the issues reported by customers include screen flickering, out-of-sync sound, video lag, flashing squares on the screen, sound problems, and patchy pictures when using the streaming device [Article 120789]. (b) omission: The software failure incident does not involve the system omitting to perform its intended functions at an instance(s). Customers reported issues such as flickering screens, freezing pictures, and dropping out of the streaming device, indicating that the system is attempting to perform its functions but encountering problems in doing so [Article 120789]. (c) timing: The software failure incident is not related to the system performing its intended functions correctly but at the wrong time. Instead, the reported issues include various performance-related problems such as screen flickering, sound issues, and patchy pictures, suggesting a general malfunction rather than a timing issue [Article 120789]. (d) value: The software failure incident does involve the system performing its intended functions incorrectly. Customers reported problems such as flickering screens, freezing pictures, sound issues, and patchy pictures, indicating that the system is not delivering the expected quality of service [Article 120789]. (e) byzantine: The software failure incident is not described as the system behaving erroneously with inconsistent responses and interactions. The reported issues mainly revolve around technical glitches affecting the visual and audio output of the Sky Glass TV, rather than erratic or inconsistent behavior in terms of responses or interactions [Article 120789]. (f) other: The other behavior observed in the software failure incident is related to various technical glitches affecting the performance of the Sky Glass TV, including screen flickering, out-of-sync sound, video lag, flashing squares on the screen, sound problems, and patchy pictures when using the streaming device. These issues collectively contribute to a subpar user experience and indicate a failure in delivering the expected quality of service [Article 120789].

IoT System Layer

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

Other Details

Category Option Rationale
Consequence property, other The consequence of the software failure incident reported in the article [Article 120789] was mainly related to property. Customers who purchased the Sky Glass TV experienced issues such as screen flickering, out-of-sync sound, video lag, flashing squares on the screen, sound problems, and patchy pictures when using the streaming device. Some customers reported returning their TVs due to frustration with the technology, while others praised the product's picture and sound quality. Sky acknowledged the reported issues and planned to release a software update to address the problems.
Domain entertainment (a) The failed system in the article is related to the entertainment industry. The software failure incident occurred with Sky Glass, a new streaming television product launched by Sky, a pay TV giant. Customers reported issues such as screen flickering, out-of-sync sound, video lag, flashing squares on the screen, and patchy pictures when using the streaming device [Article 120789]. The product aimed to simplify how people watch TV by integrating hardware, software, and content into one device, eliminating the need for a separate satellite dish or box [Article 120789].

Sources

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