Tolerance testing ran for six days.
Yeon Daesik's approach to it was methodical in the way that suggested the methodology had been refined over many repetitions until the unnecessary parts had been removed. Each student received a set of five test billets at the start of each session, each billet pre-stressed to a known degree through a combination of thermal cycling and mana-saturation, the stress values logged but not disclosed to the students. The task was to assess the billet's current tolerance state through physical and mana-based examination, record the assessment, and then apply a corrective forging process that would bring the material back within acceptable parameters.
