Time is referencial in all the slots.
At the start ,before the commission is accepted I´ll give you an aproximate timeline for the commission updates, so you´ll be clear about the process from the beggining, if you agree, we can start.

Once the request is accepted I´ll be sending one first sketch not to detailed just to define the pose, if you agree with that sketch to continue I´ll need you to pay in order to finish the job, that´s right, I preffer that you pay after the first sketch.

If any delay appears on my schedule by external reasons I´ll be sending a message explaining what happened and reprograming the next update, this message will be send considering a lapse of prudent time.