Accelerated formation protocols that utilize pulsed charging offer an unprecedented wealth of electrochemical data. Herein we present methods to extract diagnostic data relating to a pseudo-diffusion coefficients, internal resistance, and others that give live insight to the solid electrolyte interphase (SEI) growth. Specifically, we present a pure mathematical method to track formation progression at near-real time and chart a path towards incorporation of adjusting pulse parameters towards targeted SEI synthesis. The method and analysis performed on 3 mAh cells but can also be applied to higher capacity cells.