The Loop Of Life*

1. Problem Identification  ( Background, Econ, Data, Needs, Causes, Effects)
   
2. Preliminary Ideas  (List Ideas, Sketch, Ideate, New Approach, Enlarge, Modify Old)
   
3. Refinement  (Angles and Lengths, Weights and Volumes, Scale Drawings, Intersections, Physical properties, Shapes and Forms)
   
4. Analysis  (Math, Graphics, Engineering, Science, Logic, Experience)
   
5. Decision  (Design 1, Design 2, or Design 3)
   
6. Implementation  (Working Drawings, Specifications, Models)
   

* The Design Process, Recycle steps as needed continuously!

Reference:  Mississippi State University - Mechanical Engineering 'Graphics' of 1974 and Engineering Design Graphics by James H. Earle 1973 by Addison Wesley Publishing Company