AlamutTM Visual Plus includes a splicing module accessible from the variant panel that integrates a number of prediction algorithms. It provides the user with automatically-computed prediction scores.
A brief description of splicing signal prediction can be found on page 63 available here:

AlamutTM Visual Plus computes splicing scores based on implemented algorithms. The user is responsible for interpreting these scores based on the scientific context and peer-reviewed guidelines. 
We can suggest the following paper to help you interpret splicing scores:

And the followingvideo from ClinGen: