This research presents the reciprocal and interactive  relationships between three important approaches to cost rationalization have been addressed, namely: the quality  function deployment , value engineering, and the target costing approach, and the research mainly aims at the integration between the  quality function deployment and value engineering and the target costing approach that helps in rationalizing the cost of products  without compromising their quality by achieving the desires and requirements of customers at the lowest possible cost enables competition in the market, and helps companies to survive, grow and continue, by focusing on customer priorities and accessing alternatives to product components with the characteristics and features required by customers that can be produced at a lower cost which contributes to cost rationalization.