The University of Hlinden was planning for in person classes starting Spring 2021 assuming that that the situation is back to the pre-Covid 19 times and is 'normal'. The number of chairs for students in the class room is 100. Under normal circumstances, 10% are under maintenance /checking /refurbishing even though the chairs may be in the class room. If the class is occupied above 75% of full capacity it starts utilising assets optimally. If the class is occupied below 55 seats, the University may look at another room. Optimum capacity that ensures good service in number terms is likely to be