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I’m trying to set up a formula to determine the start up date of a project depending on whether it is a Tier 1 or Tier 2 event. Tier 1 will have a 4 month lead time. Tier 2 event will have a 3 month lead time.


IF ({Tier} = 1, DATEADD({Event start}, -4, ‘month’)

IF ({Tier} = 2, DATEADD({Event start}, -3, ‘month’)


This formula is ‘invalid’ - please help!

Welcome to the Airtable community!


You need a different nesting to you formula.




IF(

  {Tier} = 1, 

  DATEADD({Event start}, -4, 'month'),

IF(

  {Tier} = 2, 

  DATEADD({Event start}, -3, 'month')

))

There are many ways to do things in code. Here is another option.




DATEADD(

  {Event start}, 

  SWITCH( {Tier},

    1, -4,

    2, -3

  ), 

  'month'

)

Welcome to the Airtable community!


You need a different nesting to you formula.




IF(

  {Tier} = 1, 

  DATEADD({Event start}, -4, 'month'),

IF(

  {Tier} = 2, 

  DATEADD({Event start}, -3, 'month')

))

There are many ways to do things in code. Here is another option.




DATEADD(

  {Event start}, 

  SWITCH( {Tier},

    1, -4,

    2, -3

  ), 

  'month'

)

Thanks so much, the second formula worked!

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