品质机能展开(Quality function Deployment，QFD)是将顾客需求转换成产品设计规格的方法。此方法的实施有赖行销、设计工程、制造等功能部门组成跨部门小组。

品质机能展开是由倾听与研究顾客开始，以决定高品质产品应具备的特性透过市场的研究，定义出顾客对产品的需求与偏好，并进一步归类出各项的顾客需求。再依据需求对顾客的相对重要性给予权重；其后要求顾客比较公司与竞争者的产品，透过这个流程可以让公司找出，顾客最重视的产品功能，并了解竞争对手产品的特性，使公司可以集中力量在需要改善的产品功能上。

Quality function deployment (QFD) is a method to help transform customer needs (the voice of the customer [VOC]) into engineering characteristics (and appropriate test methods) for a product or service. It helps create operational definitions of the requirements, which may be vague when first expressed. It prioritizes each product or service characteristic while simultaneously setting development targets for the product or service.