An economic design of constant stress accelerated life tests

This paper deals with an economic design of accelerated life test under constant stresses where failure times are exponentially distributed. In this case, the optimization criterion is the information amount per unit cost. Fisher’s information matrix of the exponential distribution’s parameters and expected cost considering fixed and variable costs are obtained. The decision variable in this model is the censoring time. In the 2-level constant stress case, it is proved that the optimal solution exists and is unique under some condition. Numerical examplles are also included. [In Korean.]