Business, functional and non-functional requirement: What is Business Rule?
Business Requirement – The needs, goals, objectives, and outcomes of the business are
presented. Majorly it is a “What” approach i.e. What does the sales department need?
It needs a digital Channel such that
customers can book tickets online.
Functional Requirement – The Way to achieve the business requirement is described, i.e. how
the business requirement can be achieved –
The system should display available seats
for movie show,
The system should allow customers to select available seats.
Non-Functional Requirement consists of –
·
Performance: The time it takes
for the system to load
·
Security: How secured is the
system
·
Reliability: How reliable is
the system
·
Usability: How easy it is to
use the system
·
Maintainability
·
Portability
Ex: The system
should be able to respond within 2 seconds of the user’s input (performance).
 |
| Business Requirement |
What is Business Rule?
A business rule is a criterion or constraint
which must be followed by the system being built. Ex: Customer can book a
maximum of 10 tickets at a time.
This business rule adds to a functional requirement, the system should not allow customers to select more than 10 available seats.
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