During the last decade there has been an increase on the use of goal-orientederror estimates which help to quantify and control the local error on aquantity of interest (QoI) that might result relevant for design purposes (e.g.the mean stress or mean displacement in a particular area, the stress intensityfactor for fracture problems,...). Residual-based error estimators have beenused to estimate the error in quantities of interest for finite elementapproximations. This work presents a recovery-based error estimation techniquefor QoI whose main characteristic is the use of an enhanced version of theSuperconvergent Patch Recovery (SPR) technique developed by Zienkiewicz andZhu. This enhanced version of the SPR technique, used to recover the primal anddual solutions, provides a nearly statically admissible stress field thatresults in accurate estimations of the error in the QoI.
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