The informal communication also known as grapevine, consists of the unofficial but influential means of communication, decision marking, and control that are part of the habitual way things get done in an organization. This type of communication can take place with face-to-face communication, email, text messages and phone calls. Formal communication, is a more structured form of communicating in the work place.
You should consider what could go wrong, a flat tire, a piece breaks, not enough man-helpers.