The order of the four stages in "S curve and technological evolution law" in TRIZ theory is (infancy, growth period, maturity period and decline period).
infancy-infancy: low efficiency, poor reliability, many problems, difficult to grasp the future, and high risk. A few people invest. The improvement of performance is relatively slow, the patent level is relatively high, the number of patents is small, and the economic benefit is negative.
growing period-adolescence: the performance improvement is accelerated, the patent level begins to decline, the number of patents increases, and the economic benefits are rapidly improved, attracting a large number of capital.
mature period-young adults: the performance tends to be perfect, the patent level drops, the number of patents will be more, and the economic benefit is very good.
decline period-old age: the performance basically does not improve, the patent level declines, the number of patents declines, and the economic benefits decline. Generally, it is because of the emergence of new alternative technologies or the gradual reduction of demand that it will enter the recession period.