Valdés, José E.; Zequeira, Rómulo I. - In: Statistics & Probability Letters 63 (2003) 3, pp. 325-332
Let X1 and X2 be independent random variables representing the lifetimes of the components C1 and C2, and Y1 and Y2 be random variables, independent of X1 and X2, representing the lifetimes of the spares R1 and R2, respectively. Suppose that the components C1 and C2 form a series system. There...