What is the most important aspect of sales process training?

Adoptablity of audiance, how effectively they demonstrative their understanding during the training process.

if you are asking about only one aspect then I would choose the need generation because the need is the focal point of any sales transaction. The need determines the value and the value determines the price that the customer will be willing to pay, consequently the profit that the seller is going to achieve. Need generation defines the short and long term opportunities for the organization so it shapes the present and the future of the organization. Needless to say that the other components of the sales process are also important.

Hope this satisfies your need raised through the question!

Regards

Dr. Said