Managing Trade-offs in Adaptable Software Architectures

Chapter 14

Identifying and Handling Uncertainties in the Feedback Control Loop

R. de Lemos*^,†; P. Potena^‡    * University of Kent, United Kingdom^† CISUC, University of Coimbra, Portugal^‡ Fondazione Bruno Kessler, Trento, Italy

Abstract

In the feedback control loop, uncertainty is associated to different sources (e.g., the environment), and appears in different forms (e.g., as noise in variables or imperfections in techniques being used). In the MAPE-K control loop, uncertainty is normally handled by the decision maker at the Plan stage. However, depending on the complexity of the stages of the MAPE-K control loop, uncertainties need also to be handled at other stages, depending on the uncertainties associated with that stage. Moreover, uncertainties ...