Third party litigation requires a substantial level of expertise. Lawyers must know how to properly investigate a workplace injury and determine who should be held responsible. For instance, the manufacturer of a product has a duty to insure that the product is safe for its intended use. Unfortunately, equipment may be defectively designed, inadequately inspected, carelessly assembled and or inadequately tested. It may be lacking adequate warnings and directions for proper use as well as proper safety devices. The supplier of the equipment may neglect to provide all required safety devices. Or, the person who inspects or maintains the machinery may cause it to become unsafe. A third party who modifies or alters a product and renders it unsafe is legally responsible for the injury that it causes.