There really isn't a formula for building a jump...in fact, there's a group of people (mostly lawyers) trying to pass a law which forces terrain park builders (cutters) to build off of certain angles and shapes. The problem with this are a few reasons.
1. Different jumps need different angles and amounts of pop...i.e. step-downs require less pop than tabletops and step-overs.
2. These jumps change through-out the day...if they had to be a certain angle, they'd be closed more than they'd be open.
3. It would take a ridiculous amount of time and skill to get every single jump you build to be the exact right dimensions and angles....you really think a cutter is gonna get out of his cat at 3 in the morning with a protractor? Kinda absurd.
The best way for them to learn how to build jumps is to have someone who knows how to build them show them. This could be going to Cutter's Camp ( http://www.saminfo.com/events/cutters.php
), or having to actually hire someone to actual come and sit in a cat with them for a few days and just build jumps.
Also, don't be afraid to voice your concerns to your park crew, you most likely won't talk directly to the cutter (although, if it's a small enough hill you might), simply explain what you think needs to be adjusted (i.e. pop, launch, angles, landing steepness, knuckle cut, ect). They'll be abel to either relay your concerns to the Manager or to the Cutter themselves, OR explain to you why the jump is built the way it is. Some areas are required for certain reasons (i.e. lawyers, insurance, and/or management) to build certain jumps (like the hill I work at, we're only aloud to have Step-Ups, Step-Overs, and Tabletops open to the public).