CSE460 Lecture 25

Software Analysis and Design
Structural Complexity
(202104)

Transcript

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   CSE 460
   Software Analysis and Design
   Lecture 25: Structural Complexity
   Dr. Javier Gonzalez-Sanchez
   javiergs@asu.edu
   javiergs.engineering.asu.edu | javiergs.com
   PERALTA 230U
   Office Hours: By appointment
   

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   Announcements
   § Assignment 06 is due tonight
   We have done a total of quizzes and 6 assignments (4.1666% each)
   § Final Exam is scheduled Wednesday April 21 (during lecture time)
   A review scheduled for Monday
   

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   • Instability = Cout
   (Cin + Cout)
   Stable Abstraction Principle (SAP)
   

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

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   Example
   ITeamA = 6 / 0 + 6 = 1
   ATeamA = 0
   DTeamA = 0 + 1 – 1 = 0
   IJlabel = 0 / 4 + 0 = 0
   AJlabel = 0
   DJlabel = 0 + 0 – 1 = -1
   |Djlabel| = 1
   Pain Zone (just an example!)
   

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   Stable Dependency Principle (SDP)
   § Every dependency between modules should terminate on a module whose
   Instability is less than or equal to the depending
   module's Instability.
   § Every dependency between modules should terminate on a module whose
   Abstractness is greater than or equal to the depending
   module's Abstractness.
   

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   Example
   MyNewClass
   OtherClass
   

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   CSE 460 Software Analysis and Design
   Javier Gonzalez-Sanchez
   javiergs@asu.edu
   Fall 2020
   Disclaimer. These slides can only be used as study material for the class CSE460 at ASU. They cannot be distributed or used for another purpose.
   

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