Conservative estimation

Doing conservative estimations means to estimating things such to that if the result is wrong it is wrong on the safe side with plenty of safety margin.

E.g. Purposefully with safe margin underestimating a performance X parameter such that
one can be sure (with high confidence) that no conservative estimations of performance parameter Y_i break
when Yi depends is transitively dependent on X in that it needs X to be above a critical threshold. (For all i.)

Sticking to conservative estimations is one of three important pillars for exploratory engineering.