The role of reliability management tools and document cannot be over emphasized due to its role in ensuring better product all through it life cycle. It also helps the reliability Engineer to distinguish and oversee resource dependability hazards that could unfavorably influence plant or business tasks. This paper tried to look at the reliability management tools and document, and review the works of other researchers on the area of configuration management, value engineering, critical path and reliability manual. From their discussion it was admitted that reliability management tools play a key role in engineering industries hence its application in the different sector of life.