o make S,2 weeks to make T,2 weeks to make U,1 week to make V,2 weeks to make W,2 weeks to make X,2 weeks to make Y, and 1 week to make Z. Click the icon to view the product structure and the time-phased product structure. Construct a gross material requirements plan (type 0 if the input box is not used). More Info The product structure. The time-phased product structure