3D CAD Modeling, PLM and PDM
Many times, when we get requests for 3D Modeling Services, the company making the request has digital files that have been acquired by scanning old Mylar of paper 2D drawings. Often these are scans of parts, and/or assemblies that are used in long-life products, such as aircraft, naval ships, and heavy machinery. What they don't have are 3D models.
The reason they need 3D models is so that they can incorporate the parts into their current 3D CAD system, often using Solidworks or Catia. Once the models are in their CAD system, they can retrofit, recreate, or machine replacement parts for their long-life products.