Use of the proper mixing technology is often essential for successful process results. This online course considers how we can choose appropriate mixing conditions for laboratory, pilot, and commercial scale units to ensure technical success. The course begins by rooting us in some essential basics of mixing technology. With those fundamentals, we then progress through different mixing applications in increasing levels of complexity: single-phase (blending and heat transfer), multiple phase (solid-liquid, immiscible liquid, gas-liquid, and 3-phase), and mixing in competitive rate processes (reactions and crystallizations). Throughout, we look at scale-up and scale-down by using examples from industrial processes which have a variety of mixing requirements. We will discuss how to design and execute practical experiments at the small scale which can identify mixing sensitivities in a process that could be an issue on scale-up. Though primarily focusing on operations in stirred tanks, we will also discuss mixing applications in flow systems like static mixers.