Due to your vague question, I'll try to answer.
If you're talking about self-improvement, you don't personally realize the change; others do and tell you. Never ask.
If you're talking about indications about woman's breast development, they generally go from mosquito bites to anywhere from apples to watermelons. And contrary to popular belief, nipples that face the ceiling are augmented. Breasts don't naturally develop that way. If the nipples point down or forward, they're the real things. Accept no substitutes.
If you're talking about indicators of land development, look for land with no homes, wealthy, white businessmen in suits huddled together as minorities in the background do the construction. Homeless people are another indicator for land development. They're probably former farmers who fought in Vietnam. Give them a couple of dollars, they deserve it.
If you're talking about the development of the human brain, ha! What development? Google "devolve."
If you're speaking of developing a sense of humor, that is a preference.
If you're speaking of development of government, that's tricky. People vote, then men in suits with flags pinned to their lapel and shout at each other until a decision is made. Sometimes secret organizations develop government, this indicator is called assassination.
If you're talking about computer software development regarding indicator lights, dude, I don't know anything about technology. Sorry.
Hope this helps.