I want to trigger 3 other tasks on completion of a particular task and so on.

Sometimes 2 tasks got triggered by completing of one task. 

But I can't find any particular setting to manage that.

As well as the project statuses are useless at I have to manually go and edit the status of a project. It should be automatically updated on the basis of progress.

Main this is, let me know how to trigger 3 other tasks on completion of a particular task. 

PS: Don't tell to add dependency.