Search results
Results from the WOW.Com Content Network
For example, three identical systems starting to function properly at time 0 are working until all of them fail. The first system fails after 100 hours, the second after 120 hours and the third after 130 hours. The MTBF of the systems is the average of the three failure times, which is 116.667 hours.
Because software, unlike a major civil engineering construction project, is often easy and cheap to change after it has been constructed, a piece of custom software that fails to deliver on its objectives may sometimes be modified over time in such a way that it later succeeds—and/or business processes or end-user mindsets may change to accommodate the software.
Maintenance mode often transitions to abandonware. In the world of software maintenance , it refers to the operational mode a device or service may enter when it is being maintained. For example, while diagnosing, reconfiguring, repairing, upgrading or testing it may be necessary for the device or service to drop to maintenance mode until its ...
When an MSI-based program is launched, Windows Installer checks the existence of key paths. If there is a mismatch between the current system state and the value specified in the MSI package (e.g., a key file is missing), the related feature is re-installed. This process is known as self-healing or self-repair. No two components should use the ...
A systems development life cycle is composed of distinct work phases that are used by systems engineers and systems developers to deliver information systems.Like anything that is manufactured on an assembly line, an SDLC aims to produce high-quality systems that meet or exceed expectations, based on requirements, by delivering systems within scheduled time frames and cost estimates. [3]
Planned operations on the ISS were interrupted through a series of EVAs to address the cooling system issue. A first EVA on Saturday, 7 August 2010, to replace the failed pump module, was not fully completed due to an ammonia leak in one of four quick-disconnects. A second EVA on Wednesday, 11 August, successfully removed the failed pump module.
Douglas test pilot Johnny Cable bailed out at 300 feet, his chute unfurled but did not have time to deploy, he was killed on impact, the flight engineer John Parks rode in the airframe and died, but 33-year-old French Air Force Capt. Paul Chemidlin, riding in the aft fuselage near the top turret, survived with a broken leg, severe back injuries ...
This category is for airliner crashes caused by errors or failure made by maintenance crews. Pages in category "Airliner accidents and incidents caused by maintenance errors" The following 37 pages are in this category, out of 37 total.