This document summarizes the objectives and key lessons learned from Vibha Chaswal's work calibrating treatment machines and calculating monitor units. It discusses nuances of clinical monitor unit calculations using the TG-51 protocol for high energy photons and electrons. Through examples of isocentric, off-axis, and tangential field calculations, it covers techniques for minimizing errors and highlights lessons like accounting for missing tissue, using the effective depth, and challenges of breast and chest wall treatments. The document also reviews TG-51 calibration conducted for a linear accelerator's photon and electron beams.