The ability to optimize and tailor the properties of an electroceramic is one of the most challenging capabilities that an electroceramist must develop. Due to the fact that such a strong link exists between the microstructure of an electroceramic and its macroscopic electrical properties, significant efforts need to be made to control the factors and parameters that influence the characteristics of the microstructure. This chapter discusses the construction, utilization, and implementation of master sintering curves as specifically applied to electroceramics. The findings presented here demonstrate that a systematic approach to design, predict and control sintering of electroceramic systems is possible through the implementation of the master sintering curve.