below is a brief summary of techniques and services that vary upon the design and total height of the building : 1. LASER Plummet Method Using pre-determined openings on slabs and formwork, setting out an offset of the tower core walls using high accuracy Total Station. A special long – distance LASER beam will be shot from ground floor to control the measures of the concrete walls, this method is valid in simple core geometry and shorter buildings (up to 200 meters max in total height). It is Simple, fast and easy way, but drawbacks of this method is that it neglects the dynamic movements of the tower under various loads and LASER is limited to certain heights. Formwork engineering will pay a major factor whether to decide going with this method or to choose more sophisticated one. 2. Core Walls Control Surveying System Method (CWCSS) Perfectly applied in many super high-rise buildings such as • KAFD Public Investment Fund Tower, Riyadh (400 meters) • Jeddah Tower (under construction 1000 meters +) This method comprise usage of GPS static measurements, Total Stations, Inclinometers and special software to process and analyze surveying data. No matter how high and complicated the design is, this proven high accurate (up to 2 mm) method is the way to perform fast concrete cycles and adjust construction errors on spot.