CSC307 Lecture 15

Introduction to Software Engineering
Software Metrics II
(202307)

Transcript

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   CSC 307
   Introduction to Software Engineering
   Lecture 15:
   Software Metrics II
   Dr. Javier Gonzalez-Sanchez
   javiergs@calpoly.edu
   www.javiergs.com
   Building 14 -227
   Office Hours: By appointment
   

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   Code Metrics
   

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   Metrics
   Size
   LOC
   eLOC
   lLOC
   Complexity
   Average, Max, Min LOC
   Cyclomatic Complexity
   Software Metrics
   

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   Structural Metrics
   

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   Example A
   

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   Example B
   

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   Abstractness
   

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   § Express the portion of contained abstract types.
   § It is a value 0 to 1:
   0 (only concrete classes) to
   1 (only interfaces and abstract classes)
   Abstractness of a Package
   

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   Instability
   

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    § Indicates whether
    (a) the item is mainly used by others (stable – hard to change); or
    (b) it mainly depends on other items (instable – changeable).
    § It is a value between 0 and 1:
    0 only incoming dependencies to
    1 (only outgoing dependencies)
    Instability
    

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    Distance
    

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    § Distance: how far a package is away from
    the Main Sequence
    § D = A + I – 1
    § Values -1 to 1
    § Absolute Distance |D|
    Distance
    

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    Stable Abstraction Principle
    Abstract
    concrete
    Stable
    Hard to Change
    Only incoming dependencies
    Unstable
    Changeable
    Only outgoing dependencies
    

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    Test Yourselves
    

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    Question
    project3.common.model
    project3.client.UI
    project3.server.controller
    

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    Question
    

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    Key Ideas
    

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    Project Presentation
    Product
    Process You
    

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    Demo of your project.
    Show your project running.
    First Act – Demo
    

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    Taiga à Stories, Backlogs, and Task board
    Stories (INVEST), Sprint backlog, product backlog.
    Estimation (story points)
    Talk about tasks; who is doing what?
    Everybody is doing some programming!
    Show and explain your Burndown Chart.
    Second Act – Your process
    

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    Show your class diagram.
    Use colors as needed
    (Single Responsibility Principle)
    What are the A, I, or D in the new class?
    (show the 2D plot regarding where your classes are in terms of the pain zone)
    Third Act – Software Design
    

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    Show US your GitHub
    Who is doing What?
    (everyone is adding or updating code)
    Show US your Code and Code Metrics
    Are your metrics OK (LOC, eLOC, lLOC, CC)?
    Any significant aspect that you want to share?
    Fourth Act – Code
    

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    Review
    What is Good in the product?
    What is next for the product (next features to be added)?
    (your promise for the next sprint presentation)
    Retrospective (Process & People)
    What went well?
    What did not go well?
    Fifth Act – Review and Retrospective
    

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    Questions
    

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    Office Hours
    Tuesday and Thursday 3 - 5 pm
    But an appointment required
    Sent me an email – javiergs@calpoly.edu
    

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    CSC 307
    Introduction to Software Engineering
    Lab 15:
    Software Metrics II
    Dr. Javier Gonzalez-Sanchez
    javiergs@calpoly.edu
    www.javiergs.com
    Building 14 -227
    Office Hours: By appointment
    

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    Think about this
    Calculate metrics for
    Final Project class diagram
    

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    Let’s Work
    

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    CSC 307 Introduction to Software Engineering
    Javier Gonzalez-Sanchez, Ph.D.
    javiergs@calpoly.edu
    Summer 2023
    Copyright. These slides can only be used as study material for the class CSC308 at Cal Poly.
    They cannot be distributed or used for another purpose.
    

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