During my placement with SA Power Networks, I worked on a project focusing on developing a simple and accessible tool that would enable planners to create native load duration curves (LDCs) to perform cost benefit analysis of selected projects. The tool needed to be created to accept substation load data, PV generation data, and insolation data, and then process this data to determine the native load at defined time intervals. With those data point Native LDCs could be created, allowing a better understanding of asset utilisation which supports investment decision making across the network. This project is important in supporting SAPN’s transition to a probabilistic investment approach. Easy access to accurate load duration curves becomes critical when considering the economic benefits of a diverse group of projects. These curves are directly used in calculations of energy at risk, which is necessary in weighing the cost of augmentation against the customer value of avoiding lost load. Streamlining the curve creation process is important in supporting efficient engineering. The community as a whole also benefits from this work as by supporting SAPN’s ability to identify the most valuable projects, a better balance can be achieved between reliability and cost efficiency. This helps ensure customers are not paying for unnecessary upgrades while still receiving the stable and resilient electricity supply they rely on. Supporting evidence based investment decisions ultimately strengthens the long term affordability and performance of the network.