For more detailed information, see our answer to this question for educators. Use of formal methods reallocates time spent in implementation and testing to time spent in design.
Time spent in design is less costly than time spent later in the development cycle.
Thus, use of formal methods reduces the cost of development. Formal methods graduates have learned to develop solutions , not just implementations. They are better problem solvers who can approach new problems confidently. Their success rate in solving unfamiliar problems is better than that of other students. A thinking process firmly grounded in logic enables them to solve problems correctly the first time , rather than taking several rounds of patching or debugging reach a correct solution.