SIA QUIZ 2

Represents a discrete unit of interaction between a User (human or machine) and the system.

• use case

• sequential

• Class

It must be true before the use case is run.

• Pre-conditions

• post-conditions

• invariants

these are always true. (e.g an order must always have a customer number.

• pre-conditions

• post-conditions

• invariants

it a sequential descriptions of the steps taken to carry out the use case.

it is the user of the system

It Correspond to the functional specifications found in structured methodologies.

These are formal rules and limitations that a Use Case operates under, and includes pre-post and invariant condtiions.

It is an interaction diagram that emphasizes the time ordering of messages.

what do you call that in a sequence diagram is rendered as a box with dashed line descending from it?

It represents the existence of an object over a period of time.