How to dependence sub-task with other sub-task?

Sinem Karakurt

Hii, I need your help! 

There is one task. Task has 3 sub-task. what i want to do is

Untill first sub-task is closed, second sub-task should not be started. Untill second sub-task is closed, third sub-task should not be started. I tried both condition and validation but ı cant do. I guess that I need a validation. How can I do?

Jack Brickey

You don’t have that level of control OOTB. The challenge is determining which is first, second and third. I could think of a possible very complex and cumbersome automation concept but TBH I would not even go there.