During times of significant price disparity between liquids and gas, it has become increasingly important for upstream oil and gas companies to sell NGLs and effectively manage the measurement, allocation, and reporting of them. There are many complex problems associated with NGLs, including quality analysis, complex allocations, and the fact that plant operating data used to determine daily liquids-to-gas breakdown isn’t available until weeks after the close of the month and is available only at the monthly level.