1. An article comprising: a non-transitory storage medium having stored instructions that when executed by a machine result in the following: generating a first status indicator and a second status indicator; generating a first attention value to indicate an amount of attention a user should devote to the first status indicator, and a second attention value to indicate an amount of attention the user should devote to the second status indicator; and outputting the first and second attention values to enable display for the user, wherein each of the status indicators is associated with a reliability factor and a probability of failure and said generating the attention values is based on a function of the reliability factor and the probability of failure.