Boeing does research, design, development, engineering, final assembly. Parts and subsystems are built by suppliers. That is why the 'factories' look so empty. Most profitable part of airplane building is done by Boeing in its 'workers' heads. Same with Intel, Microsoft, Google etc., If the software engineers from Microsoft drive across the border from Redmond to Vancouver, a two trillion dollar 'factory' moves from U.S. to Canada.Do you think a factories workforce is just the people who assemble the parts?