Well, you can't actually do an engineering analysis of a rock face, so you're never going to achieve that level of rigor. Placing protections and building anch

Well, you can't actually do an engineering analysis of a rock face, so you're never going to achieve that level of rigor. Placing protections and building anchors is a combination of experience and intuition; observation and analysis techniques; and a bit of actual physics around angles, direction of force, rope stretch, and force multipliers.