  Two tripartite schemes are put forward with shared entanglements and LOCC for
sharing an operation on a remote target sate. The first scheme uses a Bell and
a symmetric W states as quantum channels, while the second replaces the
symmetric W state by an asymmetric one. Both schemes are treated and compared
from the aspects of quantum resource consumption, operation complexity,
classical resource consumption, success probability and efficiency. It is found
that, the latter scheme is better than the former one. Particularly, the
sharing can be achieved only probabilistically with the first scheme
deterministically with the second one.
