Also, through identifying which elements of the programme can run in parallel and which must be sequential then the desired event duration can be ascertained.
Yn ogystal, drwy nodi pa elfennau o'r rhaglen y gellir eu rhoi ar waith ar yr un pryd a pha rai y gellir eu cynnal ar ôl ei gilydd, gellir penderfynu ar hyd y digwyddiad a ddymunir.