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L5 211321 Nishal

Lab Report #5 by Nishal Karki introduces sequence diagrams in UML, which visually represent interactions between system components over time. The report outlines objectives, key components such as actors, objects, lifelines, and messages, and highlights advantages like clarity, error detection, and scalability. This document serves as a reference for understanding and designing complex systems and workflows.

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12 views5 pages

L5 211321 Nishal

Lab Report #5 by Nishal Karki introduces sequence diagrams in UML, which visually represent interactions between system components over time. The report outlines objectives, key components such as actors, objects, lifelines, and messages, and highlights advantages like clarity, error detection, and scalability. This document serves as a reference for understanding and designing complex systems and workflows.

Uploaded by

nishalkarki605
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Lab Report # 5

Submitted By:
Name: Nishal Karki

Roll no: 211321


Faculty: Science and Technology
Semester: Sixth
Submitted To:
Instructor : Er. Manil Vaidhya
DEPARTMENT OF COMPUTER ENGINEERING

Submission Date: 2081-09-18


Introduction to Sequence Diagram
A sequence diagram is a type of interaction diagram in Unified Modeling Language
(UML) that visually represents how objects in a system interact over time. It shows
the flow of messages between various objects, processes, or components,
arranged in a time-ordered sequence.

Objectives
1. To represent the sequence of events in a process or interaction.
2. To visualize how components communicate and collaborate in a system.
3. To analyze and design the logic of complex systems or workflows.
4. To identify bottlenecks or inefficiencies in the interaction flow.

Key Components of a Sequence Diagram


1. Actors:
a. Represent external entities (e.g., users or external systems) that
interact with the system.

2. Objects or Classes:
a. Represent components or entities within the system that are part of
the interaction.

3. Lifelines:
a. Vertical dashed lines below each object or actor to represent
their lifetime during the interaction.

4. Messages:
a. Arrows that indicate communication or interaction between objects.
b. Synchronous Messages: Represent a call that requires a response.
c. Asynchronous Messages: Represent communication without
requiring a response.
5. Activation Bars:
a. Thin rectangles on the lifeline showing the period an object is active.

6. Loops and Conditions:


a. Represent repeating actions or decision points in the interaction.

Advantages of Sequence Diagrams


1. Clarity: Provides a clear and easy-to-follow representation of the order and
flow of interactions in a system.
2. Error Detection: Helps identify potential design flaws, bottlenecks, or
missing interactions in the system.
3. Collaboration: Facilitates communication among team members by offering
a common visual language.
4. Documentation: Acts as a reference for developers and stakeholders
during development and maintenance.
5. Scalability: Can model simple to complex processes, from small interactions
to large systems.
Figure: Sequence diagram

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