Software is everywhere but reliable software is still rare. We live in a world w here software bugs can and do ground planes, block medication from being prescri bed, block financial transactions from completeing etc. How do we ensure that critical software is reliable, and works as expected in al l situations. 100% uptime is impossible but there should be planning for gracefu l degradation, for creating paths of resilience so that impact of any outages ar e minimized. I'm going to take some time and break down topics in this area, one blog at a ti me.