Escalation status to be calculated as per below:
Conditions: 1)if the status is "ETA Slipped" and Original ETA is > 15 days and Revised ETA is null Escalation status should be "ETA slipped beyond 15 days" 2)if the status is "ETA Slipped" and Original ETA is > 15 days and Revised ETA is < 15 days Escalation status should be "ETA slipped within 15 days" 3)if the status is "ETA Slipped" and Original ETA is > 15 days and Revised ETA is >15 days Escalation status should be "ETA slipped beyond 15 days" 4)if the status is "ETA Slipped" and Original ETA is > 30 days and Revised ETA is null Escalation status should be "ETA slipped beyond 30 days" 5)if the status is "ETA Slipped" and Original ETA is > 30 days and Revised ETA is >30 days Escalation status should be "ETA slipped beyond 30 days"
I am able to get this in the excel as below:
IF([Status]<>"ETA Slipped",[Status],IF(MAX([Original ETA]:[Revised ETA])>today(),"On track",IF(SUM(MAX([Original ETA]:[Revised ETA]),30)<today(),"ETA Slipped beyound 30 days",IF(SUM(MAX([Original ETA]:[Revised ETA]),15)<Today(),"ETA Slipped beyound 15 days","ETA Slipped within 15 days"))))
But this is not working in sharepoint calculated formula. Pls guide me.

MAXfunction is called with comma-separated parameters, not colon ":". Such asMAX([Column1], [Column2]). I do believe it works with Dates though, just numbers. https://support.office.com/en-us/article/max-function-ffb82196-748c-49d9-916a-86aca191b669 – willman Jan 23 '20 at 18:29