The Brewing operation basically mixes malt with grains and has a capacity of 24,000 lbs/hr. In the Fermentation step, yeast is added to aid fermentation of the liquid. Its capacity is 23,000 lbs/hr. Filtration removes any unwanted residual ingredients. It has a capacity of 25,000 lbs/hr when it is running. After 105 min of operation, the filter has to be exchanged, which takes 15 min. Finally, in the Kegging step, the beer is being put into kegs and is then ready for distribution. The kegging capacity is 20,000 lbs/hr. Management thinks of adding buffer storage capacity to the above process. It can be installed only in one portion in the process. Where would you place the buffer