The document discusses architectural adaptation and software evolution. It characterizes different types of changes that can occur, including corrective changes, new features, and changes to the operating environment. It also describes different levels at which changes can be made, from the component interior to the overall system configuration. Effective adaptation requires techniques like explicit architectural models, adaptable connectors, and message-based communication. The roles of change agents, strategic and tactical planning, and quiescence are also outlined.

1. Architectural Adaptation Software Architecture Lecture 25

8. Shearing Layers in a Building Figure adapted from “How Buildings Learn”; Stewart Brand, © 1994 Stewart Brand.

11. To Shear or Not to Shear – Pompidou Center Software Architecture: Foundations, Theory, and Practice ; Richard N. Taylor, Nenad Medvidovic, and Eric M. Dashofy; © 2008 John Wiley & Sons, Inc. Reprinted with permission.

19. Time of Change Software Architecture: Foundations, Theory, and Practice ; Richard N. Taylor, Nenad Medvidovic, and Eric M. Dashofy; © 2008 John Wiley & Sons, Inc. Reprinted with permission.

21. Conceptual Architecture for Adaptation From: “An Architecture-based Approach to Self-Adaptive Software”, Oreizy, et.al. IEEE Intelligent Systems, 14 (3), 1999.

23. Strategy, Tactics, and Operations Software Architecture: Foundations, Theory, and Practice ; Richard N. Taylor, Nenad Medvidovic, and Eric M. Dashofy; © 2008 John Wiley & Sons, Inc. Reprinted with permission.

27. API-Based Extension Software Architecture: Foundations, Theory, and Practice ; Richard N. Taylor, Nenad Medvidovic, and Eric M. Dashofy; © 2008 John Wiley & Sons, Inc. Reprinted with permission.

28. Plug-In Based Extension Software Architecture: Foundations, Theory, and Practice ; Richard N. Taylor, Nenad Medvidovic, and Eric M. Dashofy; © 2008 John Wiley & Sons, Inc. Reprinted with permission.

29. Component-Object Approach Software Architecture: Foundations, Theory, and Practice ; Richard N. Taylor, Nenad Medvidovic, and Eric M. Dashofy; © 2008 John Wiley & Sons, Inc. Reprinted with permission.

30. Scripting-Based Extension Software Architecture: Foundations, Theory, and Practice ; Richard N. Taylor, Nenad Medvidovic, and Eric M. Dashofy; © 2008 John Wiley & Sons, Inc. Reprinted with permission.

31. Event-Based Extension Software Architecture: Foundations, Theory, and Practice ; Richard N. Taylor, Nenad Medvidovic, and Eric M. Dashofy; © 2008 John Wiley & Sons, Inc. Reprinted with permission.