The following list of links are directed to tatting technique pages that have been helpful for me. I am in no way intending to take credit for them. I'm just sharing them. They are here for my future reference and if they help you, too, then I'm glad! I'm a firm believer in the importance of sharing tatting resources.
Thread Usage Prediction (Lady Shuttle Maker)
Thread Usage Prediction (InTatters)
Video Beading & Non-Twisted Picot by Linda S. Davies
I hope you find these links useful!