Processes and Products Most of IndustAirCo's facilities operate using pressure swing adsorption to produce oxygen, however, they are willing to explore other processes. IndustAirCo is used to produce oxygen for medical purposes, however, they would like to receive a business case that could diversify their business model for the UK, enabling them to still be the first medical grade oxygen provider. Economic Aspect The clients are expecting to make decisions about the project by the end of 2023, hence for your estimates, the present time needs to account for 2023 as reference year. The clients do not know the optimum annual production, this is one of your tasks; however, they are considering a payback time of no more than 10 years