Just lookin' for some basic education....did a few searches and didn't find anything.

Why and when do brake rotors warp?

If rotors going to warp, does it usually happen early in their life?

Does warping indicate a manufacturing defect? Or not necessarily?

If not, then what are the external factors that cause rotors to warp?

Thanks!

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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
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1961 Very Tolerant Wife