1. Stock Parts
   1. Tech Installs Part
      1. Parts department orders parts.
         1. Parts received
            1. SD invetory updated
2. Special Parts
   1. Tech request parts department to order part
      1. Parts department orders parts.
         1. Parts received
            1. Tech Installs part
   2. Tech orders part from vender
      1. Parts received
         1. Tech Installs part