If and formula help

Hello @Archie,

By looking at the surface replace "=IF("
with "IF(" in all instances except the first one.
In addition, for every "IF(" you need an end parentheses ")" to close your statement.

Like so:

=IF(AND(Performance@row < 2, Trust@row < 2), "C1",
IF(AND(Performance@row < 2, Trust@row >= 2, Trust@row < 3), "C2",
IF(AND(Performance@row < 2, Trust@row >= 3, Trust@row < 4), "C3",
IF(AND(Performance@row < 2, Trust@row >= 4, Trust@row < 5), "B10",
IF(AND(Performance@row < 2, Trust@row >= 5), "B11",
IF(AND(Performance@row >= 2, Performance@row < 3, Trust@row < 2), "C4",
IF(AND(Performance@row >= 2, Performance@row < 3, Trust@row >= 2, Trust@row < 3), "C5",
IF(AND(Performance@row >= 2, Performance@row < 3, Trust@row >= 3, Trust@row < 4), "C6",
IF(AND(Performance@row >= 2, Performance@row < 3, Trust@row >= 4, Trust@row < 5), "B8",
IF(AND(Performance@row >= 2, Performance@row < 3, Trust@row >= 5), "B9",
IF(AND(Performance@row >= 3, Performance@row < 4, Trust@row < 2), "C7",
IF(AND(Performance@row >= 3, Performance@row < 4, Trust@row >= 2, Trust@row < 3), "C8",
IF(AND(Performance@row >= 3, Performance@row < 4, Trust@row >= 3, Trust@row < 4), "C9",
IF(AND(Performance@row >= 3, Performance@row < 4, Trust@row >= 4, Trust@row < 5), "B6",
IF(AND(Performance@row >= 3, Performance@row < 4, Trust@row >= 5), "B7",
IF(AND(Performance@row >= 4, Performance@row < 5, Trust@row < 2), "C10",
IF(AND(Performance@row >= 4, Performance@row < 5, Trust@row >= 2, Trust@row < 3), "C11",
IF(AND(Performance@row >= 4, Performance@row < 5, Trust@row >= 3, Trust@row < 4), "B5",
IF(AND(Performance@row >= 4, Performance@row < 5, Trust@row >= 4, Trust@row < 5), "A1",
IF(AND(Performance@row >= 4, Performance@row < 5, Trust@row >= 5), "A2",
IF(AND(Performance@row >= 5, Performance@row < 5.5, Trust@row < 2), "C12",
IF(AND(Performance@row >= 5, Performance@row < 5.5, Trust@row >= 2, Trust@row < 3), "B3",
IF(AND(Performance@row >= 5, Performance@row < 5.5, Trust@row >= 3, Trust@row < 4), "B4",
IF(AND(Performance@row >= 5, Performance@row < 5.5, Trust@row >= 4, Trust@row < 5), "A3",
IF(AND(Performance@row >= 5, Performance@row < 5.5, Trust@row >= 5), "A4",
IF(AND(Performance@row >= 5.5, Trust@row < 2), "C13",
IF(AND(Performance@row >= 5.5, Trust@row >= 2, Trust@row < 3), "B1",
IF(AND(Performance@row >= 5.5, Trust@row >= 3, Trust@row < 4), "B2",
IF(AND(Performance@row >= 5.5, Trust@row >= 4, Trust@row < 5), "A5",
IF(AND(Performance@row >= 5.5, Trust@row >= 5), "A6", "")))))))))))))))))))))))))))

This is another option with less complexity you can experiment with.

It is possible another error will occur,
but let me know the result so we can explore what that is.

A screen shot of the formula bar would be super helpful :-)

You may benefit from having a separate sheet with two columns as a matrix or legend.

For example:

Column one being the range of numbers 1.0 through 5.5
Column two being the result for those numbers A1 through C13

Then, use an INDEX MATCH formula in your primary sheet.
Reference the RANGE of column two in the matrix/legend sheet with the results.

Awesome!
Happy this worked for you.