For the stage one, is it common to use Chart, e.g. Gantt chart to explain work-plan, do people use chart in stage one?

Answer:

I would recommend integrating a Gantt or Pert Chart in first stage proposals only when you stick to the page limit. The Guide for Applicants does not foresee to have a Gantt or Pert Chart at stage one.2019 Air Vapormax Flair