5ad0d9c6_Manage_Roadmaps___Rally_Help__Description
[Field] WIP Limit [Description] 
Set WIP limits to determine how many portfolio items should be in each state. Set a WIP limit of -1 for no WIP limit. A value of 0 means anything you put in the state column generate an error. You can set a maximum of 200 portfolio items per column. The No Entry column has a maximum of 50 entries. WIP is administered by type for each workspace. If WIP is exceeded in a state column, the column turns red. Specify a WIP limit for each state in each portfolio item type.
Manage Roadmaps | Rally Help