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At the NYSE, BATS, CBOT, NASDAQ, OMX and American Stock Exchange requests for review must be received "within thirty (30) minutes of execution time". [ 5 ] [ 6 ] At the NYSE-Euronext Liffe (Paris, Brussels, Amsterdam), "Where a member has executed an Erroneous trade, he will have a maximum of 30 minutes from the time of execution within which ...
under 0.1 seconds the response is perceived as instantaneous (high user satisfaction); 1.0 seconds between 0.1 seconds and 1.0 second a slight delay is perceived, which is regarded as annoying in a local system but tolerated in a web interface that depends on a remote system for the response; this kind of delay usually does not interrupt user's ...
Phrases used by the tech savvy to mean that a problem is caused entirely by the fault of the user include PEBKAC [8] (an acronym for "problem exists between keyboard and chair"), PEBCAK [9] (an alternative, but similar, acronym for "problem exists between chair and keyboard"), POBCAK (a US government/military acronym for "problem occurs between ...
It is only used when the user actually has to wait for the system. For instance, when the user mentally prepares (M) for executing their next physical action only the non-overlapping part of the response time is needed for R because the user uses the response time for the M operation (e.g. R of 2 seconds – M of 1.35 seconds = R of .65 seconds).
The time to seek and depress a key (seek-time) and the time the key is held down (hold-time) may be characteristic of an individual, regardless of the total speed at which they type. Most people take longer to find or get to specific letters on the keyboard than their average seek-time for all letters.
The XY problem obscures the real issues and may even introduce secondary problems that lead to miscommunication, resource mismanagement, and sub-par solutions. The solution for the support personnel is to ask probing questions as to why the information is needed in order to identify the root problem Y and redirect the end user away from an ...
Ignoring transmission time for a moment, the response time is the sum of the service time and wait time. The service time is the time it takes to do the work you requested. For a given request the service time varies little as the workload increases – to do X amount of work it always takes X amount of time.
While WCET is potentially applicable to many real-time systems, in practice an assurance of WCET is mainly used by real-time systems that are related to high reliability or safety. For example, in airborne software some attention to software is required by DO178C section 6.3.4. The increasing use of software in automotive systems is also ...