上游充通大￥ SHANGHAI JIAO TONG UNIVERSITY Two other decomposition approaches Decomposition by sequence of user actions Example:the nailer problem might be broken into three user actions Moving the tool to the gross nailing position Positioning the tool precisely Trigger the tool This approach is often useful for products with very simple technical functions involving a lot of user interaction Decomposition by key customer needs Example:the nailer problem might include Fires nails in rapid succession Is lightweight -Has a large nail capacity This approach is useful for products in which form,and not working principles or technology,is the primary problem.Examples of these products are Toothbrushes Storage containersTwo other decomposition approaches  Decomposition by sequence of user actions • Example: the nailer problem might be broken into three user actions – Moving the tool to the gross nailing position – Positioning the tool precisely – Trigger the tool • This approach is often useful for products with very simple technical functions involving a lot of user interaction  Decomposition by key customer needs • Example: the nailer problem might include – Fires nails in rapid succession – Is lightweight – Has a large nail capacity • This approach is useful for products in which form, and not working principles or technology, is the primary problem. Examples of these products are – Toothbrushes – Storage containers