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Those goals should be satisfied before any release of the system (for instance, a patient safety sensitive Health Information Technology cannot be released if it has been shown to induce errors of use ). For this kind of “safety-oriented usability goal”, a non-achievement reveals that the use of the tool may lead to dramatic consequences. 80% of users must achieve using a function that make easier the browsing on the Internet, as a short-cut) while a usability goal concerning a major risk for users' or environment' safety would require a total achievement (no error tolerated e.g.100% of the users must succeed in using a defibrillator at their first trial).

For instance, a “comfort of use usability goal” dealing with the easiness of browsing on the Internet that does not endanger users' safety could require a partial achievement (e.g. If some goals are related to safety issues while others are more “comfort of use usability goals', they will not all require the same level of achievement. Filmes e Series Mega Torrents » Filmes » Desafiando Gigantes - DVDR ip AVI - Dublado. O ltimo Caador de Bruxas Legendado Ted 2 Dublado. 2012 Download Filme Desafiando Gigantes Dual Audio + RMVB Dublado. Prioritization For a given tool under evaluation, several usability goals are defined. Gratis filmes legendado baixar gratis filmes dublado avi 2012 filmes. Thus, risks that may result in use errors must be identified and then, for each of them, usability goals must be defined, taking into account the severity of the potential consequences of the risk (for instance, in terms of operator, patient or environment safety).

This kind of “safety-oriented usability goal” is used to prevent a tool being released on the market while identifying deficiencies in its interface design that could induce. Business goals Moreover, for certain types of products that are used for sensitive purposes (for instance, medical devices or nuclear plant control interface), usability goals must be defined in close relation to the process of those products. The tasks that the different categories of identified end-users are supposed to perform with the tested system in a given context of use (results from a Contextual Task Analysis). More practically, Mayhew proposes that their definition should refer to. USEDPIZZAEQUIPMENT.Their definition, for each of those components, must rest on the characteristics of the tasks that the tested system is supposed to support.

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