Ease distribution in relation to the X-line style jacket. Part 1: Development of a mathematical model

When the three-dimensional garment style was transformed into the two-dimensional garment pattern, the information of ease distribution was crucial because the ease of the garment was one of the important elements in constructing garment style. To model the ease distribution of X-line style jackets, the ease distribution was qualitatively presented by the shapes of cross section at different altitude. The newly defined segmental girth ease allowance provided a quantitative understanding of the ease distribution. A mathematical model of ease distribution was established in the X-line style jacket by using the surface fitting approach, which may predict the ease distribution of jackets in different dimensions. The ease distribution models of bustline, waistline, and hipline in X-line style of jackets were satisfactory because of lower root-mean-square error, especially compared with the actually measured data.