What does the "spider" mean?

The graphic that I sent out that looked like a spider was showing the different channels or delivery methods (on the right side) and the various drivers or considerations. The author points out that many drivers overlap and some delivery channels overlap and drivers and channels do not map "one-to-one". There is more than one way to deliver learning, with the ultimate being that all ways would be used to deliver all content. The bottom line is that this would be too costly and too time consuming and not all content could be delivered by every method. The author proposed multi-channel delivery to insure that content is delivered through the most effective channel. Different delivery methods may be needed for different phases of a single educational need. For instance, you might start with an e-mail to inform people about the need, followed by a web cast of the subject and eventually have a full self paced class. The author contents that the physical or virtual presence of an instructor is just one way to learn and that the humble book is the delivery channel that has the greatest power. If we can combine the power of the book with current e-learning tools we would have the most powerful method. A general rule is that content that is cheap to develop is expensive to deliver (classroom) and content that is expensive to develop is cheap to deliver (self-paced on-line). Delivery methods should be looked at in the beginning and it is crucial that you look at infrastructure to determine the best delivery method for a particular content.