IF statement with multiple columns and logical tests

So something like the following?

Column = 
  SWITCH(
    TRUE(),
    [Validation Result OET] = “obligatory test” && ISBLANK([Validation Date OET]), "obligatory test",
    [Days to DET Validation Deadline] < 0 && ISBLANK([Validation Date DET]), “Not Timely”,
    [Days to OET Validation Deadline] < 0 && ISBLANK([Validation Date OET]), “Not Timely”,
    [Days to DET Validation Deadline] <= 30 && ISBLANK([Validation Date DET]), “0-30”,
    [Days to OET Validation Deadline] <= 30 && ISBLANK([Validation Date OET]), “0-30”,
    [Days to DET Validation Deadline] > 30 && [Days to DET Validation Deadline] <= 60 && ISBLANK(Validation Date DET), "30-60",
    [Days to DET Validation Deadline] > 30 && [Days to DET Validation Deadline] <= 60 && ISBLANK([Validation Date OET]), “30-60”,
    “over 60”
  )

 Warning, probably a few syntax errors hiding in there but this should provide the concept.