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What diagrams are needed in D3? Should there be an activity diagram for every user story?

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is it mandatory to have a working code which communicates with the other platforms?

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Requrements for what is needed to be able to smoothly integrate outsourced components into a full system.

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Use case for different types of architecture (physical & logical)

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Use case for different types of architecture (physical & logical)

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The user can chose to pay with cash so that they can get a ticket.

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The user can chose to pay with cash so that they can get a ticket.

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The machine needs to print the first ticket within 5 seconds of a successful purchase. For every additional ticket it should also take max 5 seconds per ticket.

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The machine needs to print the first ticket within 5 seconds of a successful purchase. For every additional ticket it should also take max 5 seconds per ticket.

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After every ticket purchase/transaction, the system has to send the details of the ticket

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The machine must be able to detect and refuse fake bills and fake tickets

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Recognize original as well as fake currency notes

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Recognize original as well as fake currency notes

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The system must provide discounts on tickets of frequent travelling passengers

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The system must provide discounts on tickets of frequent travelling passengers

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The system show related errors for incomplete transactions so user could understand why it failed

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The system show related errors for incomplete transactions so user could understand why it failed

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The system is required to recognize original as well as fake currency notes.

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The system is required to recognize original as well as fake currency notes.

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Travelers should be provided with options of selecting a ticket for a single trip, round trips or for multiple tríp by the system

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Travelers should be provided with options of selecting a ticket for a single trip, round trips or for multiple tríp by the system

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User can select types of ticket so they can have single trip, round trips or for multiple trips

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User can select types of ticket so they can have single trip, round trips or for multiple trips

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User data must not be leaked to unauthorized parties

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User data must not be leaked to unauthorized parties

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Does the D3 assignment have to contain Use Case diagram for every functional requirement?

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Does the D3 assignment have to contain Use Case diagram for every functional requirement?

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The bottleneck in client sever architecture

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The bottleneck in client sever architecture