This paper studies the impact of changes in manufacturing technology on management accounting. More specifically it focuses on the impact of technological change on investment justification and on costing systems. For each of these subjects we describe how and why traditional management accounting systems have been shown to be no longer appropriate. In addition, we give an overview of the ways companies adapt their management accounting systems to the changes in the technological environment. Some observed changes are a paradigm shift in investment decision-making, more emphasis on throughput control, less emphasis on direct labour measuring, more emphasis on maintenance and tool cost management, and increased use of machine hour overhead rates.