Question: Essential ( E ) : It is a requirement that is necessary for achieving the goal of using the system. Desirable ( D ) :
Essential E: It is a requirement that is necessary for achieving the goal of using the system.
Desirable D: It is possible to achieve the goal of using the system effectively without a desirable requirement in other words, not including desirable requirementsfunctionality is not going to influence how effectively the system works Still, it would be goodpreferable to have it implemented.
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