DOL: The Daily Order Limitation is the maximum number of orders you can          receive on a daily basis. Once this limit reached, your shop will not appear online until the next day.

PSOL: The Pending to Shipped Order Limitation is the maximum  number of        orders which can be under “Pending" status simultaneously on your Seller        Account. 

After TAAC launched:

OOS rate>10%,cancelled item>10psc(in past 2 week), the store will enter DOL
Return rate(for quality issue)>5%,and over than 5pcs(in past 4 week),the store will enter DOL