Starting with BPM tends to drive fine-grained single operator services which isn't a good thing in terms of creating a robust architecture.

若以BPM开始的话，则容易导致许多粒度过细的只包含单一操作的服务，从架构健壮性的角度来说，这并不是一件好事。

youdao

The operation involved police, Customs and Excise officials and enforcement staff from the Vehicle and Operator Services Agency (VOSA).

BBC: A55 HGV spot checks shocking, says North Wales Police

In evidence to the Deputy Commissioner, an examiner from the Vehicle and Operator Services Agency reported problems with the operator's maintenance systems.

BBC: Edinburgh, Fife & East Scotland

Traffic on the cellular network was running between 50 percent and 100 percent above normal levels, and its directory assistance and operator services were also overwhelmed, the company said in a statement.

CNN: Networks hit, but telecom stays operational