Abstract
ABSTRACT Decision-makers frequently need to develop new strategic plans to correct weaknesses or build new strengths for a changing business condition. Through QFD (Quality Function Deployment) analysis, conceptual requirements in strategic plans can be translated into program items that are operable, measurable, and capable of producing improvement. However, the crisp assessment term in a traditional QFD analysis has difficulty coping with the uncertainty in the correlation evaluation. More importantly, a group of assessment members can possess a conscious or unconscious bias in the optimism of an evaluation and in the certainty level of the linguistic terms. These problems cannot be solved using traditional QFD analysis. This research adopts a fuzzy QFD model with an optimistic index in the priority ranking procedures. This fuzzy index can correct bias problems in a consistent way for prioritizing strategic functions. A priority change display in the priority ranking according to different scenarios can provide “what-if” analysis in a decision-making environment. Moreover, changing the shapes of the fuzzy numbers in a QFD can represent the decision-makers' certainty level for different linguistic terms. A case study using QFD in the strategic manufacturing plan for a company is implemented as an illustration.
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