SER516 Lecture 24a

Software Agility
STAN + Velocity
(202104)

Transcript

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   SER 516
   Software Agility
   Lecture 24: STAN and Velocity
   Dr. Javier Gonzalez-Sanchez
   javiergs@asu.edu
   javiergs.engineering.asu.edu | javiergs.com
   PERALTA 230U
   Office Hours: By appointment
   

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   Announcements
   § Final Exam – April 22 during lecture time
   § Final Project (one more sprint and 3 “extra” activities) – due April 20
   § Academic Integrity
   

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   Previously …
   

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   Deliverables
   § Source Code
   § Document (PB, review retrospective, Burndown chart)
   § Class Diagram
   § Structural Metrics
   § Velocity
   § Self-Evaluation. What I did in this project?
   § Peer-evaluation – confidential
   

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   Stan : Structure Analysis For Java
   Final Project (Part B)
   

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   Tools
   1. Download and install STAN
   https://stan4j.com/download/
   Stand alone or Eclipse plug-in
   I need help:
   http://download.stan4j.com/app/stan-app-help-2.2.pdf
   

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   Tools
   For your submissions (sprint 1, 2, 3, 4) {
   § Review your “Robert C. Martin” metrics:
   § Ca, Ce, I, A, D.
   § Review “Violations” report
   § Review “Distance” plot
   § Review Dependency / Composition Graph
   § What can be improved?
   }
   

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   Metrics
   § Tangled
   § Abstractness
   § Instability
   § Cout aka Ce (efferent)
   § Cin aka Ca (afferent)
   § Distance
   

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   Example of Violations Report
   

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    Violations Report
    around 20 is perfect, up to 50 is
    still fine, up to 100 is critical,
    above 150 is really bad, and more
    than 250 is !
    

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    Common Problems
    § Big Fat Models
    § Spaghetti Controllers
    § Uninjected Views (Dependency injection)
    

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    Velocity
    Final Project (Part C)
    

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    Estimation and Velocity
    Estimation
    hours
    Planner Poker
    (story points)
    Velocity Story points
    Sprints
    =
    

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    Estimation and Velocity
    Estimation
    hours
    Planner Poker
    (story points)
    Velocity Story points
    Sprints
    =
    

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    Estimation
    § Do not overthink and estimation (Good-enough criteria).
    § Do not inflate numbers – wasteful and dangerous behavior.
    § Realistic Estimation Vs Estimate inflation.
    

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    Velocity
    § Do not include partially completed items
    § It measure output (size of what was delivered) not outcome (value of what
    was delivered), i.e., for velocity, complete 1 of size 8, is the same that
    complete 8 of size 1.
    § It is planning tool not team diagnostic metric.
    

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    To Do
    Using your Burndown charts from submissions (sprint 1, 2, 3) {
    § Calculate your velocity
    }
    § Estimate Sprint 4
    § Compare Estimation and velocity
    § Do they match?
    

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    Questions
    

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    Reference
    § Agile Software Development: Principles, Patterns, and Practices. Robert
    C. Martin. Prentice Hall. 2006.
    Chapter 30.
    § Essential Scrum – Chapter 7.
    

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    SER 516 Software Agility
    Javier Gonzalez-Sanchez
    javiergs@asu.edu
    Spring 2021
    Disclaimer. These slides can only be used as study material for the class SER516 at ASU. They cannot be distributed or used for another purpose.
    

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