Abstract: An equipment retrofitting project method includes the steps of conducting sales, project management (PM)/design, production and field service phases. The PM/design phase includes the steps of providing a coordinate measuring machine (CMM) and measuring spatial and dimensional coordinates of natural gas compressor station components with the CMM at the compressor station location. The coordinates are related to a reference at the compressor station location. Output is provided from the CMM in the form of part coordinate system (PCS) data comprising the spatial and dimensional data associated with the components and a 3-D model is created from the PCS data. In the production phase new and/or refurbished components are produced utilizing the PCS data at a location remote from the equipment. In the field service phase the new or refurbished components are installed in the equipment.