The utility of the SCR* toolset has been
evaluated in a number of pilot projects. In one,
NASA researchers used the toolset's consistency
checker to detect several errors in the requirements
specification of software for the International Space
Station [4]. In a second project, engineers at
Rockwell used the tools to expose 28 errors, many
of them serious, in the requirements specification of
a flight guidance system [5]. Of the detected errors,
a third were uncovered by creating the specification
with the toolset, a third in running the consistency
checker, and the remaining third in executing the
specification with the simulator.