Object-oriented (OO) programming begins with analysis and design that produce a model describing the objects in the problem domain, their relationships, creation and interactions. The workshop covers fundamentals of OO analysis and design such as abstraction, separation of variants from invariants and decoupling of system components, via appropriate applications of composition, inheritance, polymorphism, and design patterns. The workshop will progress from a small design example illustrating the principles to a larger design problem to be solved by small teams of participants. Their solutions will be discussed in terms of design goals and compared against a solution provided by the presenters.