One such strategy is test-to-scale — close cousin of the venerable test-and-learn approach that’s long been a startup staple.

If your baby is "following the curve" of the growth chart ... and perfect like the lines of the chart. Kids bounce up and down the growth charts, depending on appetite, feeding issues, illnesses ...

"One mark on a growth curve means nothing," says Tampa ... "It used to be we could predict children would end up somewhere between their mom and dad (in height)," Evers says.

That’s starting to happen more regularly as he learns to buck his passivity, and the results have been trending upward ... natural part of the development curve, according to Billups.

logistic equation: The mathematical expression for a particular sigmoid growth curve in which the percentage rate of increase decreases in linear fashion as the population size increases.

The application of a mathematical model to the growth of inbred mice and their F 1 hybrids makes it possible to analyse the inheritance of growth.