How Things Change

Change is all around us. It’s amazing to watch, and it tends to follow a single, characteristic pattern. Even though the pattern repeats, it often surprises us.

That pattern goes by various names, including the Change Curve, the ‘S’ Curve, the Sigmoid Curve, and the Logistic Curve. I’ll call it the ‘S’ Curve, mainly because my name is Steve Southard, and I’m fond of that letter.

Consider a thing, or entity. As we’ll see, it can be almost anything. It begins in a period of uncertainty, and m...