The continuum theory of sintering embodied in the constitutive description of Skorohod and Olevsky can be combined with results from mesostructure evolution simulations to model shrinkage and deformation of ceramics. An implementation (and variations) of this sintering model based on a finite element (FE) formulation that allows three dimensional (3D) components to be modeled using Sandia National Laboratories' nonlinear large-deformation FE code, JAS3D, is presented. This tool provides a capability to model sintering of complex 3D components. Recent modifications to the model dictated that the suite of verification and validations problems, developed for the model, be exercised anew on the modified version. The verification, performance, and validation of the model within JAS3D is described and discussed herein. Modifications and improvements to the original implementation of the model are then also summarized and reviewed as the model's evolution is tracked to its current form.