This paper extends the Overall Energy Effectiveness OEE 2.0 (see Vassallo and Wechsler, 2023) by applying its principles to a structured, real-world implementation in critical minerals processing. as the mining sector transitions from bulk commodities into rare earths and battery-grade materials, system design must address increased process complexity, variable orebodies, and growing ESG and traceability requirements. Using the lluka Eneabba project as a lens into project requirements, this paper outlines how a Purdue Model-based architecture across Levels 0-3-from field instrumentation through to control, supervision, and operations-can reduce commissioning time, improve process stability, and support long-term performance improvements. The approach employs an Integrated Control and Safety System to unify Distributed Control (DCS), Supervisory Control and Data acquisition (SCaDa), and safety instrumentation. It includes alarm rationalisation, simulation-based commissioning, and controls capable of handling both batch and continuous modes. Moving away from traditional PLC-based control enables a unified engineering environment, built-in redundancy, and ISa-88-compliant batch execution-critical for managing variability and supporting plant-wide visibility from day one. The paper also details a structured network design that incorporates traffic segmentation, prioritised data pathways, and inbuilt diagnostics to ensure reliability and performance. Standards such as ISa- 18.2 and IEC 62682 are applied from the outset. The result is a system that seamlessly connects sensor-level data to supervisory and operational insights - offering a clear, standards-based framework for delivering reliable, high-performance outcomes in the critical minerals sector.