Mode errors

Component Failure Mode Error Rale Upper Bound Number of Record-. 

Amplitude modulation Frequency modulation Phase imaging mode Error mode... 

A mode error is a particular kind of slip which has importance in technological systems. These occur when we believe a system to be in a particular state when in fact it is not. For example, a password may be repeatedly rejected because the user has accidentally pressed the caps lock key. The caps on mode renders the system into a state which was unexpected, unforeseen or forgotten. The use of modes in technology is often helpful as it reduces the command set and can produce a more compact user interface. However when relied upon in a safety critical business process, modes can present a significant hazard. 

A common example of a mode error in HIT systems is the use of filters to rationalise lists of data. Lists are commonly employed in user interfaces to create a master-detail workflow the list provides an overview of the available data which is linked to a second screen showing the complete dataset. Where lists have the potential to be long, designers sometimes provide a filter control. However clinicians use lists not just to ascertain what information is available but to establish what is missing. Suppose a system lists the immunisations which have been administered to a particular child. A clinician might scan the list to determine any which have been missed. Of course should a filter be inadvertently applied, wrong assumptions could easily be made. Designers who foresee this hazard will ensure that the presence and... 

Sarter, Nadine, and David Woods. (November 1995). How in the world did I ever get into that mode Mode error and awareness in supervisory control. Human Factors 37 (1) 5-19. 

The proposed functional architecture has no common mode vulnerabilities. As can be seen in Table 3.1, independence attributes are key to protect against common mode errors. There are two factors to consider here ... 

RUey, V., March 2005. Reducing Mode Errors Through Design. Avionics Magazine, p. 20. www.avionicsmagazine.com. 

Common Mode Error An error which affects a number of elements otherwise considered to be independent [ARP4754A]. 

Independence A concept that minimises the likelihood of common mode errors and cascade failures between aircraft/system functions or items [ARP4754A],... 

Issue 6 Mode errors EOF instructions vi. standard practice... 

EOPs might instruct to perform in ways that counter normal practice. This create the potential for what Norman (1988, p. 179) has called mode error in supervisory control. 

Conti dence levels (on the boundaries) mode error not accounted 90%... 

Figure 12 Field-ionization mass spectra of dibenzothiophenes (DBTs) in a diesel fuel analyzed by GC-TOF-MS in FI mode. Error in accurate mass measurement for DBTs is less than 3 mmu. Note that there are no significant fragment ions present.

Mode errors are probable whenever we face a task involving multiple options or modes of operation. These errors are inevitable when equipment is designed to have more functions than the number of control switches available. In other words, when controls are designed for more than one mode of operation, you can expect occurrences of this error. 

OPEN JDK STATUS.ERROR, NAMEJRROR. MODE.ERROR) attribute FOREIGN STRING ... 

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