Abstract
In the case of consumer business involving product planning and development based on market and competitors trend, sales and profits largely depend on the quality of their product plans. Therefore, it is necessary to complete various analysis, hypothesis formulation, and feasibility study within a given period. In this study, we developed a management system for product-planning project to built-in quality of the product plan. One feature of this system is to visualize quantitatively the progress of planning phase focusing on consistency based on dependency among planning tasks as well as task completion using "Consistency rate" and "Task completion rate" as indices. We applied the system to a product plan of a digital home appliance and verified feasibility and effectiveness.