Those are pretty safe assumptions for most of us in the United States and around the world, but not so everywhere. There are places where you can’t assume safety, and where deadly risk is ever-present.
Conclusion: Assumptions and risks are situational.
We can apply that to life: We assume the car will start . . . and then one day it doesn’t. We can assume the front steps are safe, until the day an invisible sheet of ice makes them life-changingly not. Maybe the usual is in place. Maybe not. It’s situational.
When we’re project managers, we herd uncertainty for a living. We can pay a high price for mismanaging the job.
The devilish thing about project management is its lurking unpredictability. There’s the nine-times-out-of-ten factor. So much of any project is composed of procedures we have tried and found to be true countless times. We can’t justify meticulously examining each of them each time we employ it.