Congestion pricing remains highly controversial with the public both before and after implementation.

Before implementation it is a good idea to do data profiling.

The teachers' unions also opposed their move as they were not consulted before implementation.

Any change in the procedure must be agreed with us before implementation.

Whether they would in the final 24 hours before implementation won't be known until Thursday.

They are a useful vehicle to test out ideas before implementation.

Also, all cities report public controversy before and after implementation, making political feasibility a critical issue.

The new Congress government that took charge in 1982 wanted the Act to be modified before implementation.

"Please apprise me of such modifications before implementation rather than during or after."

Next the design team gets upper management approval before implementation.