The purpose of this research was to investigate the engineering change management process in engineering-to-order projects while comparing the same process in traditional manufacturing. A single-case study at a engineering-to-order – engineering review office was performed and results were analysed in conjuction with literature covering the engineering change process in traditional manufacturing. Engineering-to-order projects and tradional manufacturing are different in many ways but share the need for a reliant engineering change process. This study found that engineering change management post- change analysis could benefit future projects in the form of quantifiable lessons learned from previous project’s engineering change data.