diagramming

/D AY1 AH0 G R AE0 M IH0 NG/
verb
  1. 1

    To represent or indicate something using a diagram.

  2. 2

    To schedule the operations of a locomotive or train according to a diagram.

Source: https://en.wiktionary.org/wiki/diagram, https://en.wiktionary.org/wiki/diagramming