Introduction to the Formal Design of Real-Time Systems

but when we state that A equals B, as well having to know what we mean by A and B we also have know what we mean by equals. This section explores the role of observers; how different types of observ- er see different things as being equal, and how we can produce algo- rithms to decide on such equalities. It also explores how we go about writing specifications to which we may compare our SCCS designs. - The final section is the one which the students like best. Once enough of SCCS is grasped to decide upon the component parts of a design, the turning the handle steps of composition and check- ing that the design meets its specification are both error-prone and tedious. This section introduces the concurrency work bench, which shoulders most of the burden. How you use the book is up to you; Im not even going to suggest path- ways. Individual readers know what knowledge they seek, and course leaders know which concepts they are trying to impart and in what order.