Difference between functional and non functional business requirements

An example of a functional requirement would be:
  • A system must send an email whenever a certain condition is met (e.g. an order is placed, a customer signs up, etc).
A related non-functional requirement for the system may be:
  • Emails should be sent with a latency of no greater than 12 hours from such an activity.

Functional requirements are the main things that the user expects from the software for example if the application is a banking application that application should be able to create a new account, update the account, delete an account, etc. functional requirements are detailed and are specified in the system design
Non-functional acquirement are not straight forward requirement of the system rather it is related to usability( in some way ) for example for an banking application a major non-functional requirement will be availability the application should be available 24/7 with no down time if possible.

Comments

  1. Unknown11 December 2018 at 08:37

    Functional requirements indicate what the item should do—the activities it must perform to fulfill the principal explanations behind its reality. The explanation behind useful necessities is that once the business investigator has comprehended the fundamental usefulness of the item, he utilizes the utilitarian necessities to disclose to the designers what must be assembled.

    Non-functional requirements portray the characteristics that your item must have or, to put that another way, how well it does the things it does. Such prerequisites make the item alluring, or usable, or quick, or solid, or on the other hand safe. You use non-useful necessities to indicate reaction times, or then again exactness constrains on counts.

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