This book constitutes the refereed workshop proceedings of the 11th International Workshop on Structured Object-Oriented Formal Language and Method, SOFL+MSVL 2022, held in Madrid, in October 2022. The 12 revised full papers included in the volume were carefully reviewed and selected from 26 submissions. They are organized in the following topical sections: Model Checking & Markov Decision Process; Model Analysis & Tool Implementation; Formal Specification & Testing; Algorithms & Verification..