Refracturing, as explained by a number of authors, is an accepted, efficient re-stimulation process for rate and recovery enhancement, with application roots in the mid 1950’s, that has made an interesting and sometimes economical comeback in shale and other low permeability, liquids-rich reservoirs. This presentation will address the question of when refracs may be economical by examination of production data, (resource recovery, well pressures, rate, composition, etc.), geological factors (TOC, stresses, saturations, regional fracture presence, etc.), well layout (orientation, well spacing, frac spacing, cluster design, etc.) and frac design (fluid type, proppant quality, rate per cluster, etc.). Field cases from the published literature will be used as examples.