An airplane is created by putting thousands of parts together. Which conversion process does this illustrate?

1. In the assembly process the basic inputs are either combined to create the output or transformed into it. 2. An airplane is created by assembling thousands of parts, which are its raw material inputs, so the inputs are being combined. 3. Steel making is the other version of the same process, where heat transforms iron and other materials into steel. 4. Process manufacturing runs in the opposite direction, breaking one input down into outputs. _Source: OpenStax Introduction to Business (CC BY 4.0), Ch 10 "Achieving World-Class Operations Management", section Converting Inputs to Outputs_