How big are systems?
ä Examples of system sizes
ä NORTEL telephone switch 10 Million Lines of
Code (Real time/Transaction processing)
ä size keeps growing: as of Fall 1998, I was given
a number of 30 Million Lines of Code by one of
the Nortel developers
ä IBM Canada C++ Compiler Suite 1 or 2
Million Lines of Code depending on how many
tools you include (General purpose + support
for real time)
ä Need well organized groups and repeatable
development processes to build and
maintain such software (Software Crisis,
Software Engineering)