The development and application of innovative diagnostic tools and techniques to measure the geometry of hydraulic fractures and their resulting properties are key to optimizing fracture treatments.  The Oil and Gas industry has utilized these diagnostic techniques and resultant lessons learned to improve daily production, ultimate recovery, recovery factor and efficiency for a range of reservoir types.  Innovation in hydraulic fracture diagnostic techniques has produced a significant number of new technologies with differing capabilities in the last decade.  In this special session the SPE Hydraulic Fracturing Technical Section would like to share an update on the general industry’s view on the capabilities of these differing diagnostic techniques and highlight the lessons learned and future opportunities for utilizing the diagnostic tools and techniques for reservoir specific fracture design optimization.