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neoschenker
 
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Default goal seek vs solver

Here we go....I'm working on a capacity analysis for a school district. In
looking at existing high schools, the projected capacity of the school
drives the number of rooms required. My student population existing in cell
Summary!B6. On another tab, called Space Needs Summary, values are
calculated for the required number of classrooms based on the population and
other factors and we also list the number of existing classrooms. I have
referenced those two totals on the Summary tab with C33 set to ='Space Needs
Summary'!D7 (required) and C35 set to ='Space Needs Summary'!D12 (existing =
56.) By hook or by crook I can figure out that a student population of 2328
gives me 56 required rooms = 56 existing (2329 gives me 57). If I do goal
seek C33 = 56 by changing B6 it doesn't give me 2328 - it gives me something
much less (2310.252......). The goal is to find the max number that matches
the existing number (2328 is the sweet spot - 2329 is one too many.) I
loaded up solver but am missing something because I can't get anything to
work. Does all of the data need to be on the same worksheet? If anyone has
some helpful hints they would be much appreciated. Thanks.