Template:Standard actuarial method

Actuarial-Standard Method
The actuarial-standard model is a variation of the actuarial-simple model. In the actuarial-simple method, the suspensions in a time period or interval are assumed to occur at the end of that interval, after the failures have occurred. The actuarial-standard model assumes that the suspensions occur in the middle of the interval, which has the effect of reducing the number of available units in the interval by half of the suspensions in that interval or:


 * $$n_{i}^{\prime }={{n}_{i}}-\frac{2}$$

With this adjustment, the calculations are carried out just as they were for the actuarial-simple model or:


 * $$\widehat{R}({{t}_{i}})=\underset{j=1}{\overset{i}{\mathop \prod }}\,\left( 1-\frac{n_{j}^{\prime }} \right),\text{ }i=1,...,m$$

Example 3: