Speed Up Index Match formula

SLConsultant

New Member
Joined
Jun 8, 2015
Messages
1
Hi, I have created the following formula and copied it to multiple rows & columns in a table in Excel which has greatly slowed down the recalculation time of the whole file. The purpose of the formula is to complete a staffing table based on a chosen a Staffing Method (so far I've only written the formula for 2 of the methods: Method 1 is based on a date to be hired and Method 6 is based on occupancy percentage thresholds) and the following variables:

The following variable is needed for all staffing methods:
Month End & Year (i.e. 11/30/2015) (which are the column headers in my table and there are currently 48 months to calculate for each position)

The following details are needed for Method 6 only:
Position Title (There are approximately 80 position titles, most of of which will use Method 1, approximately 10-20 positions will be staffed according to one of the other defined methods)
Level of Care (Method 6 refers to occupancy percentages for each month for a particular level of care)

=IFERROR(IF($D20=1,IF(M$17>$K20,$I20,0),IF($D20=6,INDEX(INDEX((_SMT1,_SMT2,_SMT3,_SMT4,_SMT5,_SMT6,_SMT7,_SMT8,_SMT9,_SMT10),,,IF($B20='KA-SMT'!$D$18,1,IF($B20='KA-SMT'!$E$18,2,IF($B20='KA-SMT'!$F$18,3,IF($B20='KA-SMT'!$G$18,4,IF($B20='KA-SMT'!$H$18,5,IF($B20='KA-SMT'!$I$18,6,IF($B20='KA-SMT'!$J$18,7,IF($B20='KA-SMT'!$K$18,8,IF($B20='KA-SMT'!$L$18,9,IF($B20='KA-SMT'!$M$18,10))))))))))),MATCH(ROUND(INDEX(M$4:M$13,MATCH($E20,$E$4:$E$13,0)),2),'KA-SMT'!$C$20:$C$119,0)),0)),0)

In this example I have 10 named ranges which represent the 10 possible position titles that use Staffing Method 6. I was hoping to not have to customize the formulas for each position title and I still need to add the other possible staffing methods and related logic into the formula! Are there some better ways to structure this? Should I use visual basic instead (and if so how?) or should I just turn off and on the recalculation of this tab in my file (and if so what is best method for accomplishing this)?
 
Last edited:

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