Mean Time to Twin Toddler Destruction

Mean Time to Twin Toddler Destruction (MTTTTD) is a variation of the metric Mean Time to Failure (MTTF) often used to describe mechanical or computer-based reliability. MTTTTD is defined as the elapsed time (T delta) between time T in which one picks up all toys used by a pair of human children and time T' in which the same twin toddlers are released to play with said toys.