Progress payments are made to general contractors, subcontractors, and suppliers as construction projects progress. Schal had full responsibility to manage the main contractor and subcontractors. The hiring process also changed as employers turned to indirect hiring through subcontractors. These auditors make unannounced visits to the East Asian subcontractors. The development of "x100" cars involved the work of many subcontractors and suppliers. First article inspections are commonplace for military subcontractors. We were unable to make payments to our subcontractors. The CRJ-X launch was delayed by several months, due to negotiations with suppliers and subcontractors. The U.S. firm will supply components through various subcontractors. A few specialist staff were self-employed or were subcontractors. Thousands of subcontractors were involved in the project. This allows subcontractors to further specialize their skills. However, the report concluded that the system was being abused by unscrupulous subcontractors. The redevelopment work has been carried out by Wates Group using a variety of subcontractors. Later plants incorporated heat recovery units supplied by subcontractors.